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Full text of "Epson Stylus Color 480 Service Manual"

SERVICE MANUAL 






EPSON 



SEIJ00002 



Notice 

□ All rights reserved. No part of this manual may be reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, 
mechanical, photocopying, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION. 

□ All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would 
greatly appreciate being informed of them. 

□ The contents of this manual are subject to change without notice. 

□ All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would 
greatly appreciate being informed of them. 

□ The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences 
thereof. 

EPSON is a registered trademark of SEIKO EPSON CORPORATION. 

General Notice: Other product names used herein are for identification purpose only and may be trademarks or registered trademarks of their 
respective owners. EPSON disclaims any and all rights in those marks. 

Copyright © 2000 SEIKO EPSON CORPORATION. Printed in Japan. 



PRECAUTIONS 



Precautionary notations throughout the text are categorized relative to l)Personal injury and 2) damage to equipment. 

DANGER Signals a precaution which, if ignored, could result in serious or fatal personal injury. Great caution should be exercised in performing 

procedures preceded by DANGER Headings. 

WARNING Signals a precaution which, if ignored, could result in damage to equipment. 

The precautionary measures itemized below should always be observed when performing repair/maintenance procedures. 

DANGER 

1 . ALWAYS DISCONNECT THE PRODUCT FROM THE POWER SOURCE AND PERIPHERAL DEVICES PERFORMING ANY 
MAINTENANCE OR REPAIR PROCEDURES. 

2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH BASIC SAFETY MEASURES AS DICTATED 
FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK. 

3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL 
INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON 
POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. 

WARNING 

1 . REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. 

2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/ 
RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT 
CONNECT IT TO THE POWER SOURCE. 

3. ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE POWER SOURCE BEFORE REMOVING OR 
REPLACING PRINTED CIRCUIT BOARDS AND/OR INDIVIDUAL CHIPS. 

4. IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE STATIC DISCHARGE EQUIPMENT, SUCH AS 
ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS. 



About This Manual 



This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Photo 720 / Stylus 
Photo EX3. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on 
the preceding page. 

Contents 

This manual consists of six chapters and Appendix. 
CHAPTER 1.PRODUCT DESCRIPTIONS 

Provides a general overview and specifications of the product. 
CHAPTER 2.0PERATING PRINCIPLES 

Describes the theory of electrical and mechanical operations of the product. 
CHAPTER 3.TROUBLESHOOTING 

Provides the step-by-step procedures for the troubleshooting. 
CHAPTER 4.DISASSEMBLY AND ASSEMBLY 

Describes the step-by-step procedures for dissaembling and assembling the product. 
CHAPTER 5. ADJUSTMENTS 

Provides Epson-approved methods for adjustment. 
CHAPTER 6.MAINTENANCE 

Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives 
required for servicing the product. 
APPENDIXProvides the following additional information for 
reference: 

• Connector pin assignments 

• Electric circuit boards components layout 

• Exploded diagram 

• Electrical circuit boards schematics 



Symbols Used in This Manual 

Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a 
procedure or an action. Be aware of all symbols when they are used, and always read WARNING, CAUTION or NOTE messages. 

Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life. 



caution Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in damage to, or destruction of, 
■ equipment. 

May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide 
additional information that is related to a specific subject, or comment on the results achieved through a previous action. 




Revision Status 



Revision Issued Date Description 


Rev. A 


May, 11 2000 


First Release 


Rev. B 


18, July 2000 


* Page 72: Fig 4-2, Fig 4-3 was revised due the change of the top housing securing screw number. 

* Page 76: Fig 4-11, Fig 4-12 was revised due to the addition of the Front Housing (Stacker Guide.) 

* Page 139: The Exploded diagram was changed with new figure. The Front Housing (Stacker Guide) was 

added in the Exploded diagram. 

* Page 141: Ref. Number 108 Front Housing (Stacker Guide) was added in the parts list. 

































Product Description 

Overview 10 

Features 10 

Basic Specification 11 

Printing Specification 11 

Paper Specification 12 

Printable Area 15 

PG Adjust Lever 16 

Ink Cartridge 17 

Input Data Buffer 18 

Electric Specification 18 

Reliability 18 

Safety Approvals 18 

Acoustic Noise 18 

CE Marking (for 220V -240V) 19 

Environmental Conditions 19 

Interface Specification 21 

IEEE-1284 Parallel l/F (Forward Channel) 21 

IEEE-1284 Parallel l/F (Reverse Channel) 22 

EEE1 284.4 Protocol 24 

Miscellanea 25 

Receive Data Buffer Full Operation 25 

Panel-less control & Status Indication 25 

Error Indication on Status Monitor 3 25 

Status Monitor 3 function 27 

Initialization 28 

Physical Specification 29 

Consumables and Options 30 

Operating Principles 

Overview 32 

Printer Mechanism 32 

Printhead 33 

Printing Process 34 

Printing Method 34 

Carriage Mechanism 35 

Paper Feeding Mechanism 36 



Paper Loading Mechanism (ASF Unit) 37 

Ink System Mechanism 40 

Pump Unit & Wiper mechanism 40 

Capping Mechanism 41 

Ink Sequence 41 

Printing mode 43 

Electrical Circuit Operating Principles 44 

C367 PSB/PSE board 44 

C367MAIN-B Board 46 

Main elements 46 

Printhead Driver Circuit 47 

PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit 48 

CR Motor Driver Circuit 48 

Reset Circuit 49 

EEPROM Control Circuit 49 

Sensor Circuit 50 

Troubleshooting 



Overview 

Unit Level Troubleshooting. 



52 
56 



Disassembly and Assembly 



Overview 

Precautions 

Tools 

Work Completion Check 

Disassembly 

Housing removal 

Printhead removal 

CR motor removal 

Circuit board removal 

Waste drain ink pad unit removal 

PF motor removal 

LD Roller removal 

HP/PE/IC Sensor removal 

Ink system unit removal (Cap & Pump unit ) . 
Paper Eject Roller removal 



68 
68 
69 
70 

71 
72 
73 
75 
76 
80 
81 
82 
85 
87 
89 



Paper feed roller removal 91 

CR unit removal 93 

Disassembling ASF frame unit 96 

Adjustment 

Overview 100 

Required Adjustment 100 

Adjustment Program feature 101 

Adjustment Program Installation Procedure 102 

Adjustment Program Initial Setting menu 103 

Sequential Repair Service Program feature 104 

Feature 104 

Printhead removal 106 

Printhead replacement 108 

Main board replacement 111 

CR unit replacement or removal 115 

CR motor replacement or removal 115 

Printer mechanism replacement 116 

Waste ink pad replacement 116 

Individual service adjustment program feature 117 

Get status function 117 

Head cleaning function 117 

Initial ink charge function 117 

Protection countercheck/reset 117 

EEPROM check function 118 

Refurbishment for DOA 119 

A4 Check pattern 120 

Maintenance 

Overview 122 

Cleaning 122 

Service Maintenance 123 

Lubrication 124 

Appendix 

Connector Summary 129 

Major Component Unit 129 



EEPROM Address Map 131 

Component Layout 134 

Exploded Diagram 136 

Parts List 141 

Electrical Circuits 145 




PRODUCT DESCRIPTION 



EPSON Stylus COLOR 480 



Revision B 



1.1 Overview 



Stylus Color 480 is developed newly for the low end product and realize a high quality 
graphic printing with the low price. 

1.1.1 Features 

Major features of this printer are as follows; 

□ High quality color printing 

■ 720dpi (H) x 720 dpi(V) dpi printing. 

■ MACH technology (4 color printing. YMCK) 

■ Micro wave, Super micro wave printing 

■ Multi-Shot & Variable dot printing 

□ Control panel less 

Host computer controls the printer. 

□ Built in I/F 

■ IEEE-1284 parallel 
Windows exclusive printer. 

□ Small, space-saving 

□ Built-in auto sheet feeder 

■ Holds 100 cut-sheets (65g/m2) 

■ Holds 10 envelopes 

■ Holds 10 transparency films 

■ Holds 30 special paper 




Figure 1-1. External View 



Product Description 



Overview 



EPSON Stylus COLOR 480 



Revision B 



1.2 Basic Specification 



1.2.1 Printing Specification 



PRINTING METHOD 



□ On demand ink jet 



NOZZLE CONFIGURATION 



□ Black: 

□ Color: 



48 nozzles x 1 row 

45 nozzles x 1 row 

15 nozzle is assigned for each 3 colors in the one row. 

(Cyan, Magenta, Yellow) 



2.2578(32/360") 



#B48 I #Y15 



#Y1 



#C15 



#M15 



#M1 



~#B1 #C1 

unit: mm 

Figure 1-2. Nozzle Configuration (Seen from the Back of the Head) 



PRINTING DIRECTION 



□ Bi-direction with logic seeking 



PRINTING SPEED 



□ Character mode: Refer to the table below 

Table 1-1. Character mode: black only 



Character pitch 


Character 
Quality 


Printable 
Columns 


CR Speed 


10CPI 


LQ 


80column 


20IPS 



□ Raster graphics mode: Refer to the table below. 

Table 1-2. Printing Speed (Raster Graphics Mode) 



Horizontal 1 Printable 1 . .. _ . _ . 1 „„ _ . _ _ . 
_ . A . 1 4 1 Available Dot 1 CR Speed Notes 
Resolution 1 Area 1 1 


480 dpi 


8.26 inch 


3968 


14.1 IPS 


Black mode 


360 dpi 


8.26 inch 


2976 


20 IPS 


-- 


720 dpi 


8.26 inch 


5952 


20 IPS 


-- 



CHARACTER SPECIFICATION 



□ Character code: None. International character sets is not available. Only following 
characters are available. 



ASCII 37 characters + Space code + One Symbol 
Alphabet A-Z (Code41H-5AH) 
Number 0-9 (Code 30H-39H) 
SPACE (Code 20H) 

Symbol # (Code 23H) 

Typeface 

Bit map LQ font: EPSON Courier 10CPI 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



CONTROL CODE 



□ ESC/P for Stylus Color 480 

□ EPSON Remote command 



PAPER FEED SPECIFICATION 



271.9ms 10 ms (10.16 mm (2/5 inch) at paper feed) 
1.67inch/sec (at continuous paper feed) 



1.2.2 Paper Specification 



CUT SHEET 



□ Feeding Method: Friction feed with ASF 

□ Paper Path: Cut sheet ASF (Top entry - Front out) 

□ Line Interval: Programmable by 1/6 inch or 1/360 inch 

□ Paper Feed Speed: 



Size: 

A4 (210x297 mm) 
Letter (216x279 mm) 
B5 (182x257 mm) 
Legal (216 x 356 mm) 
Statement (139.7mm x 215.9mm) 
Executive (190.5 x 254 mm) 

Thickness (plain paper): 

0.08mm to 0.11mm(0.003 to 0.004") 

Weight: 

64g/m 2 to 90g/m 2 (171b to 241b / 55 to 78 kg) 

Paper quality: 

Exclusive paper, Bond paper, Plain paper, recycled paper 

ASF hopper available capacity 
100 sheets 



CAUTION 



I 



No wrinkled, scuffing, torn or folded paper be used. 
No curled paper more than 5mm be used. 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



TRANSPARENCY, GLOSSY PAPER 



■ Size 

A4 (210mm x 297mm) 
Letter (216mm x 279mm) 

■ Thickness 
0.075mm to 0.085mm 

■ Quality 
Exclusive paper 

■ ASF hopper available capacity 
1 sheet 

NOTE: Transparency printing is available only in the normal temperature 



CAUTION 



i 



Use above mentioned paper at normal temperature. 

(temperature = 15 to 25%, humidity = 40 to 60% RH) 

No wrinkled, scuffing, torn or folded paper be used. 

No curled paper more than 5mm be used. 

No paper with glue on flap be used. 

No double envelops nor with window envelops be used. 

Do not print on the back. 



INDEX CARD 



ENVELOPE 



■ Size: 

No. 10 (241.3 mm x 104.8 mm) 
DL (220 mm x 110 mm) 
C6(162mmx 114 mm) 
4"x6"(220mmx 132mm) 

■ Thickness 
0.16mm to 0.52mm 

■ Weight 
45g/m2 to 75g/m2 

■ Quality 

Bond paper, Plain paper, Air mail 

■ ASF hopper available capacity 
lOsheets 

NOTE: * Envelope printing is available only in the normal temperature. 
* Keep the longer side of the envelope horizontally at setting. 



Size 

A6 Index card (105mm x 148mm) 
A5 Index card (148mm x 219mm) 
5 x 8" Index Card (127mm x 203mm) 
10 x 8" Index card (127mm x 203mm) 

Thickness 

Less than 0.23mm 

ASF hopper available capacity 
30sheets 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



SPECIAL PAPER 



Paper type: EPSON exclusive paper 

■ Photo Quality Ink Jet Paper 
A4 (210x297 mm) 

A6 (105 x 148 mm)* 
B5 (182 x257mm) 
Letter (216x279 mm) 
Legal (216 x 356 mm) 
5 x 8" (127 x 203 mm)* 1 
8xl0"(100xl48mm)*l 

■ 360 dpi Ink Jet Paper 
A4 (210x297 mm) 
Letter (216x279 mm) 

■ Transparencies *2) 
A4 (210x297 mm) 
Letter (216x279 mm) 

■ Photo Quality Glossy Film*2) 
A4 (210x297 mm) 
A6(105xl48mm)*l 
Letter (216x279 mm) 

■ Photo Paper (PP2) 
A4 (210x297 mm) 
Letter (216x279 mm) 

Photo quality card 2 (100 x 148 mm)*l 
Panorama (210 x 594 mm) 
4" x6"(l 13.6x175.4) 
100mm x 150mm 
200mm x 300mm 



■ Iron-ON Transfer Paper 
A4 (210x297 mm) 
Letter (216x279 mm) 

■ Matte Paper 

A4 (210x297 mm) 
Letter (216x279 mm) 

■ High Quality Normal Paper 
A4 (210 x 297 mm) 

NOTE: *1): Set the enclosed loading support sheet as the last sheet in the ASF. 
*2): Set the plain paper as the last sheet in the ASF. 



CAUTION 



I 



Use above mentioned paper at normal temperature, 
(temperature = 15 to 25%, humidity = 40 to 60% RH) 



Photo Sticker 

A4 (210x297 mm) 

A6 (105 x 148 mm) 

8 "x 10" (100 x 148 mm)* 1 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



1.2.3 Printable Area 



CUT SHEET 



Refer to the following table. As for the each margin area, refer to the Figure 1-3 
Table 1-3. Printable Area for Cut Sheet 



Paper Size 


Paper 
Width 


Paper 
Length 


LM/RM/ 
TM 


d^d t* Color Bottom 
BK Bottom 

. /**x Margin 
Marginal) ^^ 


A4 


210mm 


297mm 


3mm 


14 mm or more 
than 3 mm 


21mm or more 
than 3mm 


Letter 


216mm 


279mm 


3 mm 


14 mm or more 
than 3 mm 


21mm or more 
than 3mm 


B5 


182mm 


257mm 


3mm 


14 mm or more 
than 3 mm 


21mm or more 
than 3mm 


Legal 


216mm 


356mm 


3 mm 


14 mm or more 
than 3 mm 


21mm or more 
than 3mm 


Statement 


139.7mm 


215.9mm 


3mm 


14 mm or more 
than 3 mm 


21mm or more 
than 3mm 


Executive 


190.5mm 


254mm 


3 mm 


14 mm or more 
than 3 mm 


21mm or more 
than 3mm 



NOTE: *1): Bottom margin can be set up to 3mm at minimum when the paper 
length is designated with "ESC(S" command.) However, the printing 
quality is not guaranteed in the area ranging from 3mm to 14mm, from 
the form lower end. When the paper length is not designated, the bottom 
margin must be wider than 14 mm. 

*2): Bottom margin for color printing can be set up 3mm at minimum 
when the paper length is designated with "ESC(S" command.). However, 
guaranteed print area of color printing is narrow than BK 
(monochrome )printing. This is due to the each color nozzles is assigned 
in the one row nozzles. 



LM 



Printable area 



RM 



TM 



PL 



BM 



Figure 1-3. Printable Area 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



ENVELOP (PRINTABLE AREA) 



Refer to the following table. 

Table 1-4. Printable area for Envelop 



Paper Size 


Paper 
Width 


Paper 
Length 


LM 


RM/TM 


BK Color 
Bottom Bottom 
Margin(*l Margin 

) (*1,*2) 


#10 


241mm 


104.8 mm 


28mm 


3 mm 


14 mm or 

more than 

3 mm 


21mm or 

more than 

3 mm 


DL 


216mm 


279mm 


7mm 


3 mm 


14 mm or 

more than 

3 mm 


21mm or 

more than 

3 mm 


C6 


182mm 


257mm 


3 mm 


3 mm 


14 mm or 

more than 

3 mm 


21mm or 

more than 

3 mm 



NOTE: *1): Bottom margin can be set up to 3mm at minimum when the paper 
length is designated with "ESC(S" command.) However, the printing 
quality is not guaranteed in the area ranging from 3mm to 14mm, from 
the form lower end. When the paper length is not designated, the bottom 
margin must be wider than 14 mm. 

*2): Bottom margin for color printing can be set up 3mm at minimum 
when the paper length is designated with "ESC(S" command.). However, 
guaranteed print area of color printing is narrow than BK 
(monochrome )printing. This is due to the each color nozzles is assigned 
in the one row nozzles. 



LM 



Printable area 



RM 



TM 



t 



I 



BM 

T 



Figure 1-4. Printable area for Envelop 



1.2.4 PG Adjust Lever 

Unlike other products, this printer dose not have the PG (Platen Gap) adjust lever in the 
printer mechanism. So, the Platen Gap value can not be changed according to the paper 
thickness. 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



1.2.5 Ink Cartridge 



INK CARTRIDGE (BLACK) 



52.7 



f 


IDAfll 

Hi 

19.8 




51.2 



18.3 



w 

Figure 1-5. Black Ink Cartridge 



COLOR INK CARTRIDGE 



□ Type: Exclusive cartridge 

□ Color: Black 

□ Print capacity: 270 pages/A4 (ISO/IEC 10561 Letter Pattern at 360dpi) 

□ Ink life: 2 years from production date 

□ Storage temperature: 

■ -30°C to 60°C 

Being transported, within 120 hours at 60°C, within a month at 40°C 

■ -30°C to 40°C 

Packing storage, within a month at 40°C 

■ -20°C to 40°C 

Mounted on the printer, within a month at 40°C 

□ Dimension: 19.8mm (W) x 52.7 mm (D) x 38.5mm (H) 



□ Type: Exclusive cartridge 

□ Color: Magenta, Cyan, Yellow 

□ Print capacity: 150 pages/A4 (360dpi, 5% duty each color) 

□ Ink life: 2 years from production date 

□ Storage temperature: 

■ -30°C to 60°C 

Being transported, within 120 hours at 60°C, within a month at 40°C 

■ -30°C to 40°C 

Packing storage, within a month at 40°C 

■ -20°C to 40°C 

Mounted on the printer, within a month at 40°C 

□ Dimension: 42.9mm (W) x 52.7 mm (D) x 38.5mm (H) 



^ 



m 



:qp] 



ill 



< ™ » 



52.7 




51.2 



l - 

1 


i. j 


l 

\ 


If mi! it fi i 


f*= 


41.4 





Figure 1-6. Color Ink Cartridge 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



1.2.6 Input Data Buffer 

□ Buffer: 16Kbytes 

1.2.7 Electric Specification 



120V VERSION 



□ Rated voltage: 

□ Input voltage range: 

□ Rated frequency range: 

□ Input frequency range: 

□ Rated current: 

□ Power consumption: 

□ Insulation Resistance: 

□ Dielectric Strength: 

□ Leak Current : 



220 - 240V VERSION 



□ Rated voltage: 

□ Input voltage range: 

□ Rated frequency range: 

□ Input frequency range: 

□ Rated current: 



AC 120 V 

AC 99 -132V 

50 - 60Hz 

49.5-60.5 Hz 

0.4A(Max 0.5A) 

Approx. 21W (ISO/IEI 10561 Letter pattern) 
Approx. 5W in Standby mode 
Energy star compliant 

10 M ohms min. 

(between AC line and chassis, DC 500V) 

AC 1000 V rms. 1 minute or 
AC 1200 V rms 1 second 
(between AC line and chassis) 

less than 0.25mA(input:100V/50Hz) 
less than 0.75mA(input: 138V/60Hz) 



AC 220 - 240V 
AC 198 -264V 
50 - 60Hz 
49.5-60.5 Hz 
0.2A (Max. 0.3A) 



□ Power consumption: 



□ Insulation Resistance: 

□ Dielectric Strength: 

□ Leak Current : 

1.2.8 Reliability 

□ Total print volume: 

□ Printhead Life: 



Approx. 21W (ISO/IEI 10561 Letter pattern) 
Approx. 5.5W in standby mode 
Energy star compliant 

10 M ohms min. 

(between AC line and chassis, DC 500V) 

AC 1500 V rms. 1 minute 

less than 0.75mA (input: 276V/60Hz) 



: 10000 pages (A4.Letter) (except ESP,EIO,EPC) 
: 20000 pages (A4, Letter) (ESP, EIO,EPC) 

4000 million dots/nozzle 



1.2.9 Safety Approvals 



120V VERSION 



□ Safeties standards: 



□ EMI: 



UL1950 with D3 

CSA C22.2 No.950 with D3 

FCC part 15 subpart B class B 
CSA C108.8 class B 



220V -240V VERSION 



□ Safety standards: 

□ EMI: 

1.2.10 Acoustic Noise 

□ Level 



EN60950(VDE) 

EN55022 (CISPR Pub.22) Class B 

EN55022 (CISPR Pub.22) Class B 



Approx. 45dB(A) (According to ISO 7779) 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



1.2.11 CE Marking (for 220V - 240V) 



□ Low Voltage Directive 73/23/eec 

□ EMC Directive 89/336/EEC 



ENN60950 

EN55022 Class B 
EN61000-3-2 
EN610000-3-3 
EN50082-1 
IEC801-2 
IEC801-3 
IEC801 -4 



1.2.12 Environmental Conditions 



TEMPERATURE 



□ Operating: 

□ Non-operating: 



10 to 35°C (Refer to Figure 1-7) 

-20 to 60°C (with shipment container) 
1 month at 40°C 
120hours at 60°C 



HUMIDITY 



□ Operating: 

□ Non-operating: 

The environmental condition should be within the range shown in the figure below. 



20 to 80% RH 

without condensation, Refer to Figure 1-7 

5 to 85% RH 

without condensation, with shipment container 



(%) 
80 



55 



20 



10 



27 35 ("C) 



tmphumid 

Figure 1-7. Environmental Condition 



RESISTANCE TO SHOCK 



□ Operating: 



1 G, within 1ms (operating) 



□ Non-operating: 2G, within 2ms (with shipment container) 



RESISTANCE TO VIBRATION 



□ Operating: 

□ Non-operating: 



0.15G 

0.50G (with shipment container) 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



CAUTION 



I 



When non-operating, make sure the printhead is capped. 

When transporting, make sure the printhead is capped and keep 

the ink cartridge mounted on the printer. 

Under the power OFF condition, if the printhead is not capped, 

turn ON the printer after installing the ink cartridge, and turn 

off the printer after the capping has completed. 

If the printer kept under -40°C, the ink inside the printhead and 

inside the ink cartridge will be frozen. 

It takes 3 hours at 25°C to recover once frozen ink to be ready for 

use. 



Product Description 



Basic Specification 



EPSON Stylus COLOR 480 



Revision B 



1.3 Interface Specification 



Table 1-6. Connector Pin Assignment and Signals (F-Channel) 



This printer has IEEE- 1284 parallel interface and USB interface as standard. 

1.3.1 IEEE-1284 Parallel I/F (Forward Channel) 

Forward channel is the mode to transfer the ordinary printing command to the printer 
side from the PC side. 

Table 1-5. Parallel I/F Specification (F-Channel) 



Item Specification 


Transmission mode 


8bit parallel 


Synchronization 


By STROBE pulse supplied from the external 


Handshaking 


By BUSY and ACKNLG signal 


Signal Level 


TTL level (IEEE-1284-Level 1 device) 


Adaptable connector 


36 pin 57-30360 (amphenol) or equivalent 



NOTE: I/F cable is recommended to be in minimum length. 

The connector pin assignment is described below. For these signals described in the 
table, use the twist pair wire and connect the return side to the signal GND. 

Table 1-6. Connector Pin Assignment and Signals (F-Channel) 



_. _, 1 Return 1 Signal 1 _ 1 _ .. _ . .. 
Pin No. 1 ^ TT%T ». 1 mT 1 From 1 Function Description 
1 GND Pin 1 Name 1 1 


1 


19 


-STROBE 


PC 


The strobe pulse for the printer to read data. 
Pulse width requires min. 0.5|is (500ns). 
High at normal condition. Receives data after 
shifting Low. 


2-9 


20-27 


Datal-8 


PC 


The DATA 1 through DATA8 signals 
represent data bits 1-8, respectively. 


10 


28 


-ACKNLG 


Printer 


A low signal indicates the printer can accept 
data. Pulse width is 0.5 (default) or can be set 
at 2jis. 



_. _ T Return Signal ^ _ ,. _ . .. 
Pin No. ^^ TT ^ „. ° From Function Description 
GND Pin Name ^ 


11 


29 


BUSY 


Printer 


A high signal indicates that the printer cannot 

receive data. The signal becomes high under 

the condition below; 

-Receiving data. 

-Error. 

-Other I/F receiving data. 


12 


28 


PE 


Printer 


A high signal indicates paper-out error. 


13 


28 


SLCT 


Printer 


Always at high level. Pulled up to +5V via 
1 .0K£2 resistor. 


14 


30 


-AFXT 


PC 


Not used. 


31 


30 


-INIT 


PC 


The printer is initialized by the width of min. 
50jis Low pulse input. 


32 


29 


-ERROR 


PC 


A low signal indicates printer error condition. 


18 


- 


Logic H 


-Printer 


Always at high level. Pulled up to +5V via 
3.9K£2 resistor. 


35 


- 


+5V 


Printer 


Always at high level. Pulled up to +5V via 
1 .0K£2 resistor. 


17 


- 


Chassis 
GND 


- 


Printer chassis GND. 


16,33 
19-30 


- 


GND 


- 


Signal GND. 


15,34 


- 


NC 


- 


Not used. 


36 


30 


-SLIN 


- 


Not used. 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



1.3.2 IEEE-1284 Parallel I/F (Reverse Channel) 

Reverse channel is used to transfer the information data from the printer side to the PC 
side. 

Table 1-7. Parallel I/F Specification (R-Channel) 



The connector pin assignment is described in the table below. For these signals 
described in the table, use the twist pair wire and connect the return side to the signal 
GND. 



Item 1 Specification 


Transmission mode 


IEEE-1284 nibble mode 


Synchronization 


Comply with the IEEE-1284 specification 


Handshaking 


Comply with the IEEE-1284 specification 


Logic Level 


TTL level (IEEE-1284-Level 1 device) 


Data trans, timing 


Comply with the IEEE-1284 specification 


Extensibility request data 


The printer responds affirmatively when the extensibility request 

values are 00H or 04H; 

00H: Request Nibble Mode Reverse Channel Transfer. 

04H: Request Device ID; 

Return Data Using Nibble Mode Reverse Channel Transfer 



□ Device ID 

The printer sends following device ID string when it is requested. 

[00H] [5 AH] 

MFG: EPSON; 

CMD: ESCPL2, BDC, D4;(*l) 

MDL: Stylus[SP]COLOR[SP]480; 

CLS: PRINTER; 

DES:EPSON[SP]Stylus[SP]COLOR[SP]480; 

(*1): When the D4 mode (IEEE1284.4) is OFF, printer reply as follows. 
CMD: ESCPL2,BDC 

NOTE: [00H] denotes a hexadecimal value of zero. 

MDL value depends on the EEPROM setting. Refer to Appendix. 



Table 1-8. Connector Pin Assignment and Signals (F-Channel) 


Pin No. 1 rxrri p. 1 Signal Name 1 From 1 Function Description 


1 


19 


HostClk 


PC 


Host clock signal. 


2-9 


20-27 


Datal-8 


PC 


The DATA 1 through DATA8 signals 
represent data bits 1-8 respectively. 


10 


28 


PtrClk 


Printer 


Printer clock signal. 


11 


29 


PtrBusy/ 
DataBit-3,7 


Printer 


Printer busy signal and reverse channel 
transfer data bit 3 or 7. 


12 


28 


AckDataReq/ 
DataBit-2,6 


Printer 


Acknowledge data request signal and 
reverse channel transfer data bit 2 or 6. 


13 


28 


Xflag/DataBit- 
1,5 


Printer 


X-flag signal and reverse channel 
transfer data bit 1 or 5. 


14 


30 


HostBusy 


PC 


Host busy signal. 


31 


30 


-INIT 


PC 


Not used. 


32 


29 


-DataAvail/ 
DataBit-0,4 


Printer 


Data available signal and reverse channel 
transfer data bit or 4. 


18 


- 


Logic H 


Printer 


Pulled up to +5V via 3.9K ohm resistor. 


35 


- 


+5V 


Printer 


Pulled up to +5V via 3.3 K ohm resistor. 


17 


- 


Chassis 


- 


Printer chassis GND. 


16,33 
19-30 


- 


GND 


- 


Signal GND 


15,34 


- 


NC 


- 


Not used. 


36 


30 


1284-Active 


PC 


1284 active signal. 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



Following lists "Notes" when using the parallel interface. 

□ "Return GND pin" in the table means twist pair return and is connected to the 
signal GND level. 

For each signal, use the twist pair wire and connect the return side. 

Also, these cables are shielded wires and it is effective means to connect to each 

chassis GND in the center machine and printer for electrostatic noise. 

□ Refer to the timing chart for transmission timing of each signals. 

□ Do not perform data transmission ignoring -ACK or BUSY signals. (Perform the 
data transmission after confirming that either -ACK or BUSY signal is Low) 

□ It is possible to perform the printing test including interface circuit without using 
external equipment when 8-bit data signal (2-9 pin) is set to appropriate character 
code (against GND, Open="l", Short="0") and connect then forcefully to -ACK 
and -STRB. However, to perform this, "I/F selection" of EEPROM must be set to 
"Auto". Also, IEEE- 1284.4 packet mode must be set Off. 

The figure below shows the timing chart of the parallel interface. 



Table 1-9. IEEE1284 Timing Chart 



Parameter 


Minimum 


Maximum 


tsetup 


500ns 


-- 


thold 


500ns 


— 


tstb 


500ns 


— 


tready 





— 


tbusy 





— 


tt-out (*1) 


— 


120ns 


tt-in (*2) 


— 


200ns 


treply 





— 


tack 


500ns 


10us 


tnbusy 





— 


tnext 





— 



Data byte n 



Data byte n+1 



/STROBE 












w 


| 




l^ tsetup ^ 


tstb _ 


1 














"l 


BUSY 


r 














tready | tbusy I 






1 ' 




/ACKNLG 






treply ^ 




tnbusy 










taoK 





Figure 1-8. IEEE1284 Timing Chart 



(1*): Rise and fall time of every output signals. 
(*2): Rise and fall time of every input signals. 

On the above timing chart, T ack rated period is varies depend on the Parallel I/F data 
transmission speed below. 



Table 1-10. t act Typical time of T ack 


Parallel I/F Mode 1 Typical Time 


High speed 


2|is 


Normal speed 


4jis 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



1.3.3 EEE1284.4 Protocol 

The packet protocol described by IEEE 1284. 4 standard allows a device to carry on 
multiple exchanges or conversations which contain data and /or control command with 
another device at the same time across a single point-to-point link. The protocol is not, 
however, a device control language. It dose provide basic transport-level flow control 
and multiplexing services. The multiplexed logical channels are independent of each 
other and blocking of one has no effect on the others. The protocol operates over 
IEEE1284.4. 

Three function modes of IEEE1284.4 protocol, "On", "Off and "Auto" are available 
for Parallel I/F, and the setting is defined based on the data stored in the value in 
EEPROM address 25<H>. 

□ On 

Communication in IEEE 1284.4 packet mode is started by receiving a magic string 
(1284.4 synchronous commands). Until a magic string is received, other 
commands are discarded. In this setting, the printer can not communicate with 
DOS or Windows 3.X environment. 

□ Off 

Communication is carried out in the conventional mode. A magnetic string 
(1284.4 synchronous commands) is discarded. And only IEEE1284 nibble 
protocol is available. 

□ Auto 

Communication is carried out in the conventional mode until a magic string 
(1284.4 synchronous commands) is received. By receiving a magic string, 
communication in IEEE 1284.4 packet mode is started. If the printer dose not 
receive a magic string, the printer communicates the PC by IEEE 1284 nibble 
mode. 

The factory setting for IEEE1284.4 mode is "ON". But, after complete the initial ink 
charge operation, the setting of the EEPROM is set to "AUTO". The change in this 
setting will be effective when the power is back on after the initial ink charge 
operation. 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



1.3.4 Miscellanea 



1.3.5 Panel-less control & Status Indication 



1.3.4.1 Receive Data Buffer Full Operation 

Generally, hosts abandon data transfer to peripherals when a peripheral is in busy state 
for dozens of seconds continuously. In order to prevent the long busy status, printer 
start receive the data every 1 second when the reset of the input buffer become less than 
several hundreds of bytes. The printer will be in busy state continuously when the input 
buffer finally gets full. This operation is not IEEE 1284.4 protocol 



On this product, the control panel is not assembled in. So, Printer driver utility (STM39 
allows to control the printer operation instead of the Control panel and indicates the 
printer status include the several errors. 

1.3.5.1 Error Indication on Status Monitor 3 

Following printer status is displayed in the STM3 (Status monitor 3). 

□ Ink End/Low Error 

When the printer is in the ink end or low condition, the STM3 displays the status. 
If the "How to" button is clicked, the Ink Cartridge Replacement Utility runs and it 
reads the ink cartridge replacement procedure step by step. 



Black ink is low. 

Black : T013 

Click the [How to...] button for instructions on 

changing the ink cartridge now. 



J 



^"VL^ 




► How to... | |; OK ;| 




Black Ink 
T013 


i 






Color Ink 
T014 : 


1 


/ 





Figure 1-9. Ink low error indication 




Ink Levels 



Black Ink 
T013 



Black ink is out. 

Black:T013 

Replace the black ink cartridge. Click the [How 

to...] button for instructions on replacing ink 



How to... 



■■■■or" 



Color Ink 
T014 



] 



Figure 1-10. Ink out error indication 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



□ Paper out Error 

When the paper is not loaded correctly from the ASF to the PF roller, this error is 
displayed on the STM3. 



□ Fatal Error 

When the general error has occurred, this error is displayed on the STM3. 
For example, circuit damage, motor damage... etc. 



Status Monitor 3 : EPSON Stylus COLOR 430 




Microsoft Word - gjgffl.rtf 

Paper is not loaded correctly. ^] 

Reload the paper, then click the continue button. 
Click Cancel to stop any print jobs. J 



Continue 



e|- 



Ink Levels — 







Black Ink JH Color Ink " 
T013 :■ T014 : 










/ 




A general error has occurred. ~*H 

Click the [Clear] button to clear all print data from 
the Spool Manager. Remove any foreign objects, — 
packing materials, or jammed paper from inside the i 



""Cle 



Ink Levels — 






Black Ink ~h Color Ink " 

T013 :■ T014 : 






II 


s 



Figure 1-11. Paper out error indication 



Figure 1-13. Fatal Error indication 



□ Paper jam error 

When the paper is jammed between the PE sensor and the Paper eject roller, this 
error indication is displayed on the STM3. 






Paper is jammed. 

Click the Eject button to eject any jammed paper. 
If paper is still jammed inside the printer, click the 
Stop button, open the printer cover and remove the 



Eject 



...Stop 



Ink Levels — 






Black Ink "_ Color Ink " 
T013 :■ T014 I 


f * 








— / 



Figure 1-12. Paper jam error indication 



□ Maintenance Error 

When the waste ink counter reaches to the specific counter value, this error is 
displayed on the STM3. 




An unknown error has occurred. 

Unplug your printer and contact your dealer or 

authorised service center. 






OK 



d 



Ink Levels 






Black Ink ~l Color Ink " 
T013 _■ T014 . 


/ i 




II 


/ 



Figure 1-14. Maintenance Error indication 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



□ Communication Error 

When the printer can no t communicate with PC, this message is displayed on the 
STM3. 



Microsoft Word- M R1.rtf 




A communication error has occurred 

Click OK and then check the interface cable type, ^ 

all cable connections and make sure that all 



r""i;gtgp""""f]| 



■Ink Levels - 



Black 
T01 



]13 : | 



Color Ink 
T014 



Figure 1-15. Communication error indication 



1.3.5.2 Status Monitor 3 function 

STM3 in the Printer driver utility allows to perform the following functions. 

□ Nozzle Check Pattern printing 

The printer prints the nozzle check pattern and the 6 digits code of the 
firmware version & 6 digits code of the CPU Mask version. 

□ Head cleaning 

□ Bi-d adjustment patter printing 

□ Print head alignment adjustment 

□ Cancel the Paper out error 

When the paper is not loaded correctly, STM3 (status monitor 3) display the 
following message and the Paper Error can be canceled by clicking the 

"Continue" button in the STM3. 

"Paper is not loaded correctly. Reload the paper, then click the "Continue" 
button. Click "Cancel" to stop any print jobs." 

□ Cancel the Paper jam error 

When the paper is jammed, STM3 display the following message and printer 
attempt to eject the Jammed paper by clicking the "EJECT" button. 
"Paper is jammed". Click the "Eject" button to eject any jammed paper. 

If paper is still jammed inside the printer, click the "Stop" button, open the 

printer cover and remove the paper. Then close the printer cover and click 

the "Reset" button. 
Moreover, if the "Stop" button is clicked, the printing is stopped and the 

"Reset" button is displayed. If once the "Reset" button is clicked, the printer 

setting is reset. 

□ Ink Cartridge Exchange utility 

According to the procedure displayed, I/C can be replaced. In this function, 
CR moves to the I/C replacement position automatically and turn back to the 

home position after setting the I/C in the CR unit. This function is always 

available, not only Ink end or low condition. 

□ Printer Setup utility 

This utility instructs the printer set up procedure (I/C setting procedure) and 
print the nozzle check patter and head cleaning. Additionally, printhead 
alignment pattern is printed and allow the user to adjust the bi-d printing 
alignment. 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



1.3.6 Initialization 

The printer have 3 types of initialization. The initialization operations executed by each 
initialization method are described below. 



HARDWARE INITIALIZATION 

This printer initializes itself when it is turned power on or printer recognized the Reset 
command (D4 command). On this initialization, following actions are performed. 

■ Initialize printer mechanism 

■ Clear the input data buffer 

■ Clear the print buffer 

■ Set default values 

SOFTWARE INITIALIZATION 

Initialization command, "ESC@" also initializes the printer. 
On this initialization, following actions are performed. 

■ Clear the print buffer 

■ Set default values 

POWER ON INITIALIZATION EXCEPT I/F 

This printer initializes itself when the printer receive the IEEE 1284.4 reset command 
or the Parallel I/F cable is disconnected /connected. 
On this initialization, following actions are performed. 

■ Initialize printer mechanism 

■ Clears the input data buffer 

■ Clears the print buffer 

■ Sets default values except I/F setting. 



Product Description 



Interface Specification 



EPSON Stylus COLOR 480 



Revision B 



1.4 Physical Specification 



DIMENSIONS 



Stylus Color 480: 



431 mm (W) x 31 1mm (D) x 271mm (H) (Printing) 




431mm 

Figure 1-16. Stylus Color 480 Dimensions 



WEIGHT 



Stylus Color 480: 



3.0kg (without the ink cartridges) 



Product Description 



Physical Specification 



EPSON Stylus COLOR 480 



Revision B 



1.5 Consumables and Options 



CONSUMABLE 



The consumable for this printer are following; 

Table 1-11. Consumables 



Classification 



Consumables 



S020187 



S020193 



Ink Cartridge (black) 



Ink Cartridge (color) 



ENCLOSED PARTS 



The following parts are enclosed in the Production. 

Table 1-12. Enclosed parts 



Enclosed Parts Quantity 


User's manual 


1 (paper + CD-ROM) 


Driver DISK 


1(CD-ROM)\ 


Black ink cartridge 


1 


Color Ink cartridge 


1 


Power Code 


1 (220-240V version only) *1 



NOTE: *7: On the 100- 120V version product, the power cable is soldered on the 
PS board directly. 



Product Description 



Consumables and Options 




OPERATING PRINCIPLES 



EPSON Stylus COLOR 480 



Revision B 



2.1 Overview 



This section describes the operating principles of the printer mechanism and electrical 
circuit boards. The Stylus COLOR 480 has only the following two circuit boards and 
dose not have control panel: 



□ Main board: 

□ Power supply board: 



C367MAIN-B (or C367MAIN) *1 
C367 PSB/PSE 



NOTE: *1): C 3 67 MAIN board is used for the product in the first mass 

production and it will be changed to C367MAIN-B board at an early 
date. The major difference is that C 367 MAIN -B has one chip CPU 
which include the ASCI function. This section describes the operation 
principle of C367MAIN-B. 



2.1.1 Printer Mechanism 

The printer mechanism for Stylus COLOR 480 is designed newly. But, the basic 
component of the printer mechanism is same as previous product. 
This printer consists of Print Head, Carriage Mechanism, Paper Feeding Mechanism, 
Paper Loading Mechanism, Ink System (Pump Mechanism, Cap Mechanism, and 
Carriage Lock Mechanism). 

Like other EPSON ink jet printers, the Stylus COLOR 480 is equipped with two 
stepping motors; one for ASF, Paper feeding/ Pump mechanism, and one for CR 
mechanism. ASF unit uses rear entry front eject system. This ASF unit is also designed 
newly and single LD roller loads the paper to the printer mechanism. 

For cap assembly, Stylus COLOR 480 uses valveless mechanism; new design for this 
model. 



Paper Eject Roller 



Star Wheel Roller 



CR unit 



Cap Assembly 



CR lock lever 



PF Roller 



Pump Assembly 



CR Timing belt 




HP/PE/IC Sensor 



LD Roller 



Paper feed back plate 



Paper separation pad 



ASF Hopper Spring 



Clutch mechanism 



B= 



PF Motor 



CR Motor 



Figure 2-1. Printer Mechanism block diagram 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.2 Printhead 

The printhead uses a new developed U-CHIPS head and Stylus COLOR 480 can 
perform multiple shot printing and variable printing. Printhead nozzle configuration is 
as follows. 

■ 48 nozzles x 1 row: Black (nozzle pitch of the row: 1/120 inch) 

■ 45 nozzles x 1 row: Color (nozzle pitch of the row: 1/120 inch) 

In the one row for the color, 15 nozzles are assigned for each yellow, magenta, 
cyan color) 

The basic operating principles of the printhead, which plays a major role in printing, 
are the same as previous models; on-demand method which uses PZT (Piezo Electric 
Element). In order to uniform the amount of ejecting ink, the printhead has its own 
head ID (6 digits for this printhead) which adjust PZT voltage drive features. 
The printhead stores the head ID to EEPROM and generates appropriate PZT drive 
voltage to prevent amount of ink from varying by printheads. 

Following explains printhead basic components. 

□ PZT 

PZT is an abbreviation of Piezo Electric Element. Certain amount of voltage 
expands and contracts PTZ. The drive wave generated on MAIN board drives PZT 
and PZT pushes the top cavity which has ink stored to discharge the ink from each 
nozzle on the nozzle plate. 

□ Ink Cavity 

The ink absorbed from the ink cartridge goes through the filter and then is stored 
temporarily in this tank called "cavity" until PZT is driven. 

□ Nozzle Plate 

The board with nozzle holes on the printhead surface is called Nozzle Plate. 

□ Filter 

When the ink cartridge is installed, if any dirt or dust around the cartridge needle is 
absorbed into the head, there is a great possibility of causing nozzle clog and 
disturbance of ink flow, and finally causing alignment failure and dot missing. To 
prevent this problem, a filter is set below the cartridge needle, where ink is filtered. 



Head Driver Board 



Ink Cartridge 



T 



JUUUL 



/ 111 1\ ly 




Filter 



Nozzle Plate PZT Cavity 

Figure 2-2. Printhead Sectional Drawing 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.2.1 Printing Process 

This section explains the process in which the printheads of On-Demand inkjet printers 
eject ink from each nozzle. 

1. Normal State: 

When no printing signal is sent from PC, or no PZT drive voltage is applied, PZT 
does not change shape, therefore PZT does not squeeze the cavity. Ink pressure 
inside the cavity is kept normal. (Refer to Figure 2-3.) 

2) Ejecting State: 

When the print signal is output from the C367MAIN-B board, IC (Nozzle 
Selector) located on the printhead unit latches data once by 1-byte unit. An 
appropriate PZT latched by the nozzle selector is pushed into the cavity by the 
common voltage applied from the main board. By this operation, ink stored in the 
cavity spurts out from nozzles. (Refer to Figure 2.1.2.2.) 



Ink Path PZT 



Ink Cavity 




2.1.2.2 Printing Method 

For print dot system, Stylus COLOR 480 has the following two kinds of printing 
modes. 

■ Multiple shot printing 

■ Variable dot printing 

The above two printing modes are automatically selected depending on the media and 
the resolution setting of the printer driver. The following explains each printing mode. 

□ Multiple shot printing 

This printing mode is developed to improve the print quality on plain paper or 
transparencies in low resolution. The multiple shot printing mode uses normal dot 
and the number of dot shots varies from 1 shot to maximum 4 shots depending on 
the print data to enable sharp image output even in a low resolution. 

□ Variable dot printing 

This printing mode is developed to improve the print quality on exclusive paper. 
This mode is basically the same as variable dot printing mode used on other 
products /; micro dot, middle dot, and large dot compose this mode. Print dot size 
varies according to print data and this mode enables even sharper image output on 
exclusive paper. 



Nozzle plate 



PZT drive voltage 



i \ \ 




Figure 2-3. Printhead printing process 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.3 Carriage Mechanism 

The carriage mechanism consists of Carriage motor (CR motor), Carriage unit 
(including printhead), CR timing belt, CR guide shaft, CR guide frame, CR home & 
I/C detector (HP/PE/IC sensor) etc. The carriage mechanism moves the carriage back 
and forth according to the drive from the carriage motor. The following stepping motor 
is mounted to drive CR mechanism. (See the table below.) 

Table 2-1. Carriage Motor Specification 



Items 1 Specifications 


Type 


4-Phase/ 48-Pole PM Stepping motor 


Drive Voltage 


+42 V +/ - 5% (DRV IC voltage) 


Coil Resistance 


10.8 Q. +/ - 10% (per phase at 25 degree) 


Inductance 


15 mH +/ - 20%(1KH lVmA) 


Drive Method 


Bi-Polar drive 


Driver IC 


LB 1845 



The drive from CR motor is transferred to the CR unit via CR timing belt. And the CR 
home position is detected with the HP/PE/IC sensor. This sensor is available as CR HP 
detector only in the HP (home position) detection sequence & pump operation 
sequence, (not available in the paper feeding sequence for the CR HP detector because 
it is used for only PE sensor during the paper feeding sequence.) Moreover, unlike the 
previous products, this printer dose not have the PG adjustment mechanism (1.7mm). 




Figure 2-4. Carriage Mechanism (Top view) 



CR home position is detected with the HP/PE/IC sensor and the detection plate molded 
in the CR unit as following figure. When the CR home position is detected with this 
sensor, HIGH signal is output to the CPU. 



HP/IC detection Leve • 



Right side view 



CR HP detection plate 



CR HP detection plat I 




Figure 2-5. CR home position 

Unlike the previous products, I/C detection sensor is not built in the CR unit. 
The I/C is detected with the HP/PE/IC sensor and the detection plate molded on the I/C 
cover as following figure. The I/C installation condition is monitored only when the 
CR unit moves to the I/C detection position (HP detection sequence). So, this sensor 
function is not available in the paper feeding sequence. When the I/C is not installed 
into the CR unit, HIGH signal is output to the CPU. 



HP/IC detection Leve r 



Right side view 



I/C detection plate 



7TT 



i 



^ 






I/C detection plate 




HP/IC detection Lever 




High signal 



Low signal 



Figure 2-6. I/C detection position ( 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1 .4 Paper Feeding Mechanism 

The paper feeding mechanism consists of Paper feed motor (PF motor), PF roller, 
Paper eject roller, Star wheel roller, and so on. The paper feeding mechanism feeds 
paper loaded from ASF using the PF roller and Paper Eject Roller & Star wheel roller. 
For this mechanism, the PF motor mentioned in the right Table 2-2 is used on this 
product. 

The drive of the PF motor is transfer to the PF roller and the Paper Eject Roller as 
following Figure 2-7. Following shows you how to transfer the PF motor drive to the 
PF roller and the Paper Eject Roller. 

□ PF motor drive transmission path 

PF Motor Pinion Gear (CW) -> Combination Gear 8.4, 21.6 (CCW) -> Combination Gear 
9.6, 33.6(CW) -> Spur Gear 15 (PF roller)(CCW) -> Spur Gear 34.2 (CW) -* Spur gear 15 
(CCW) 



Table 2-2. PF Motor Specifications 



Item 1 Description 


Motor type 


4-Phase/ 48-Pole PM Stepping motor 


Drive voltage 


+42 V +/ - 5% (DRV IC voltage) 


Coil Resistance 


10 £2+/ -10% (per phase) 


Inductance 


10.5 mH +/ - 20%(lkH lVrms) 


Driving method 


Bi-Polar drive 


Driver IC 


LB 1845 



4> 



Top view 



HP/PE/IC Sensor 




PF Motor 

a 



Combination 
Gear 12.6, 18.4 



ima 



*M^ 



^ — trtr 



Paper Feed Roller Paper Eject Roller 




Spur Gear 15 
Spur Gear 15.2 



Spur Gear 35.2 



Combination 
Gear 22.4, 32 




Combination Gear 11.2, 32.4 
\ PF Pinion Gear 
Combination Gear 9.6,33.6 Combination Gear 8.4, 21.6 



Non paper 



Feeding Paper 




Paper 



Figure 2-7. Paper Feeding Mechanism 



Paper loaded from ASF is advanced by the following roller. 

□ Paper feed roller & Paper guide roller (assembled on the Top Frame) 
eject roller & Star wheel roller (assembled on the Paper eject frame). 



► Paper 



Additionally, the top & end of the paper is detected with the HP/PE/IC sensor. 
In case the PE sensor dose not detect the paper in the paper loading sequence, the 
printer detects the "Paper out error". If the paper is detected after complete the paper 
eject sequence, the printer detects the "Paper jam error". 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.5 Paper Loading Mechanism (ASF Unit) 

The Paper loading mechanism is positioned at the printer rear. The Paper loading 
mechanism loads paper at the ASF unit and feeds paper to the PF roller. 

This ASF unit was designed newly for this product and consists of LD roller, Pad 
holder (Paper return plate), ASF Frame, Hopper, and so on. 

For the major feature of this ASF unit, ASF HP sensor is not used and the single LD 
roller is built in the ASF unit. 

Drive sent from the PF motor is always transmitted to the ASF unit side. But, the 
Change lever and the Clutch mechanism switch ON/OFF the PF motor drive to the LD 
roller with the motor rotational direction. 

Drive from the PF motor is transmitted to the ASF unit as described below: 

□ Switch the PF motor drive to ASF unit side 

PF Motor pinion gear rotates CCW direction with a specific steps -» Combination 
Gear 8.4, 21.6 (CW) -> Combination Gear 11.2, 32.4 (CCW) -> Change Lever 
rotates (CCW) — > Release the Clutch mechanism lock position 

Following Figure 2-8 shows you the switching path for PF motor drive to ASF unit 
side. 




Combination 
Gear 11.2, 32.4 



PF pinion gear 

Figure 2-8. Switch the PF motor drive to ASF unit side 



□ Transfer the PF motor drive to LD roller 

PF Motor pinion gear rotates CW direction-* Combination Gear 8.4, 21.6 (CCW) 
-^ Combination Gear 11.2, 32.4 (CW)-> Change Lever rotates (CW) -» 
Combination Gear 22.4, 32 (CCW)-> Spur Gear 35.2(CW) (include the clutch 
mechanism) — » LD roller (CW). 

Following Figure 2-9 shows the PF motor drive transmission path to the LD roller unit 
built in the ASF unit. The LD roller is assembled on the same shaft that the Spur gear 
35.2 is assembled. 



Top View 



n 



m 



■ m% i 



4Hh 



Spur Gear 35.2 



Change Lever 



Combination 
Gear 22.4, 32 




Combination Combination 

Gear 8.4, 21.6 PF pinion gear Gear 11.2, 32.4 

Figure 2-9. PF motor drive transmission path 



When the PF motor torque is switched to the ASF unit side by the clutch mechanism, 
the function of the ASF mechanism varies depending on the rotational direction of the 
PF motor, as shown in the table below. 



Table 2-3. ASF unit function & PF Motor rotational direction 


Directions 


Corresponding Functions 


Clockwise (*1) 


• Picks up and loads paper 


Counterclockwise (*1) 


• Release the DE lever & Clutch mechanism 



(*1): The PF Motor rotational direction = seen from the right side of the printer. 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



□ Clutch Mechanism 

Unlike the previous products, this product dose not have a ASF HP sensor. 
Instead of the ASF HP sensor, Change lever and the Clutch mechanism are used to 
detect the ASF home position. Following figures describe the mechanism. 



NOTE: 

The Clutch gear is molded on 
the back side of the Spur gear 
35.2 such as Combination gear. 



Spur gear 35.2 



Change Lever Clutch gear 




Figure 2-10. Disengage & Clutch mechanism 



The Clutch mechanism transmits the PF motor drive to the LD roller shaft only when 
the Clutch gear rotates CW direction after the Change lever releases the Clutch lever. If 
the Clutch gear rotates CCW direction, the PF motor drive is not transmitted to the LD 
roller. This is due to the combination of the shape of the Clutch gear and the Clutch 
lock tooth such as described on the figure. 

1 . When the paper is advanced with the PF roller, the Change lever is set on the Clutch 
lever and the Clutch is pushed down as above Stepl's figure. As the result, the Clutch 
gear (* 1) is released from the Cluck lock tooth and the drive from the PF motor is not 
transmitted to the LD roller shaft. 

2. When the PF pinion gear rotates CCW direction in the above Step2's figure, the 
Change lever moves to the left direction with the CCW rotation of Combination gear 
1 1.2, 32.4. The Clutch turns back to the engagement position by the tension force of 
the Tension spring 0.143 and the Clutch gear is engaged with the Clutch lock tooth as 
above Step2's center figure. 

3. When the PF pinion gear rotates CW direction in the above Step3' s figure, the Change 
lever moves to the right direction with the CW rotation of the Combination gear 1 1 .2, 
32.4. And the drive from the PF motor is transmitted to the LD roller shaft via Clutch 
gear and Clutch lock tooth. 

4. The LD roller shaft rotates about 360 degree and the Change lever push the Clutch 
lever and the PF motor drive is interrupted. This position is the ASF home position. 



□ Paper Return Plate (Pad holder) 

Unlike the previous products, The Paper return plate is built in the ASF frame instead 
of the Paper return lever. The Paper separation pad is also stacked on the plate. 
It works with the spring force of the Torsion spring 28.9 (mounted in the ASF frame) 
as following figure. 

LD roller Hopper 




ASF frame Torsion spring :Z83r 



Compression spring 2.67 



Figure 2-11. Paper Return Plate 

The Paper return plate is set to return the paper to the paper stand-by position in the 
ASF unit when the ASF unit is in the standby mode. When the paper is fed with the 
LD roller, the Paper return plate is stored in the ASF frame by the LD roller. 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



Following figures show you the ASF paper loading sequence and the operation of the 
each mechanism. 



LD roller 

LD roller shaft 

Paper return plate 

When the paper is advanced with 
the PF roller, Change lever push 
down the Clutch lever as right 
figure and the Clutch lock tooth is 
disengaged from the Clutch gear. 
As the result, the drive from the PF 
motor is interrupted and the LD 
roller dose not rotate. 
This position is the ASF home 
position. 

The Paper return plate is set to 
avoid that the paper is slipped 
down from the paper set position. 



The PF motor pinion gear rotates 
CW direction and the drive from the 
PF motor is transmitted to the ASF 
LD roller shaft through the Clutch 
lock tooth and the Clutch gear. 
The ASF hopper release lever rotates 
with the ASF LD roller and release 
the ASF Hopper. The ASF hopper is 
pushed with the Compression spring 
2.67 and the paper is picked up with 
the ASF LD roller. 




PF motor pinion 
gear CW rotation 



When the paper is loaded (pick up) from 
the ASF unit, the Change lever moves to 
the printer front side with the CCW 
rotation of the PF motor pinion gear and 
releases the Clutch lever. As the result, 
the Clutch turns back to the engagement 
position by the tension force of the 
Tension spring 0.143. 
And the Clutch lock tooth is engaged 
with the Clutch gear as right figure. 





x 




/ \ / 


\\ 




ml 




\ 


^o-y 


\ 


V 


r^ 



The ASF LD roller rotates CW direction 
moreover and the Paper return plate is 
stored under the ASF frame. 
The paper is advanced up to the PF roller, 
and the ASF LD roller & the clutch rotate 
to the "Stepl" position. The Clutch lever 
is locked with the Change lever. 
The drive from the PF motor is 
interrupted and the drive is transmitted to 
the PF roller side. 



Figure 2-12. ASF Paper Loading Sequence 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.6 Ink System Mechanism 

Ink system mechanism consists of pump unit (include the CR lock lever) and capping 
mechanism. Ink system mechanism drives the pump unit that presses cap to the 
printhead and ejects ink from ink cartridge, head cavity and cap to the waste ink pad. 

2.1.6.1 Pump Unit & Wiper mechanism 

The pump unit is driven by PF motor. PF motor drive is always transmitted to the paper 
feeding mechanism and pump unit through the following gears. Refer to the Figure 
2-14. 

PF Motor Pinion Gear (CW) -> Combination Gear 8.4, 21.6 (CCW) -> Combination Gear 
9.6, 33.6 (CW) -^ Spur Gear 15 (PF Roller Gear) (CCW) -^ Spur Gear 34.2 (CW) -^ Spur 
gear 15 (CCW) -> Combination Gear 12.6, 18.4 (CW)-> Spur Gear 15.2 (CCW) 
(Pump unit) 

The Pump unit and Wiper mechanism drives according to the PF motor rotational 
direction, as shown in the right table. 



Table 2-4. PF motor rotational direction & Ink System Mechanism 



Directions 1 Functions 


Counterclockwise (*1) 


• Sets the wiper. 

• Absorbs ink by the pump unit 

• Set the CR lock lever 


Clockwise (*1) 


• Resets the wiper. 



(*1): The PF Motor rotational direction = seen from the right side of the printer. 
Following figure shows the overview of the pump mechanism operation. 




Figure 2-13. Pump mechanism 



PF Motor 




Star Wheel 



Combination 
Gear 12.6, 18.4 



Spur Gear 15.2 
Cap unit (p um p U nit) S P ur § ear 




— PF Pinion Gear 
Combination Gear 9.6, 33.6 Combination Gear 8.4, 21.6 



Figure 2-14. PF motor drive transmission path to the Pump unit 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.6.2 Capping Mechanism 

The capping mechanism covers the printheads with the cap holder to prevent the nozzle 
from increasing viscosity when the printer is in stand-by mode or when the printer is 
off. This product has valveless cap system. Air valve function used for the previous 
models pumps and ejects ink only inside the cap by absorbing ink with the valve open. 
By opening the Air valve, the negative pressure is decreased and only the ink inside the 
cap is ejected, (the ink is not absorbed from Ink cartridge or head cavity.) 
But, valveless cap system, this operation is done out side of the capping area. 
The CR moves to left side of the Cap assembly and the pump absorbs the ink inside the 
cap. 




Figure 2-15. Cap Mechanism 



2.1.7 Ink Sequence 

□ Initial ink charge 

After the product is purchased and the printer is turned on for the first time, the 
printer must be performed the initial ink charge and charges ink inside the head 
cavity. When the initial ink charge is completed properly, the printer releases the 
flag inside the EEPROM and no initial ink charge will be performed next time the 
power is turned on. Stylus COLOR 480 takes 110 seconds to complete the initial 
ink charge sequence and consume about half of the brand-new black ink cartridge. 

□ Manual Cleaning 

Unlike the previous models, the manual CL is available only though the utility 
included in the printer driver because this printer dose not have control panel. 
Stylus COLOR 480 provides three types of manual cleaning to clean air bubbled 
or clogged ink with viscosity or foreign substances. 

The following manual CL sequences can be executed by the utility included in the 
printer driver. 

■ CL1 

- Ink absorption 

Black Ink: 0.21ml, Color Ink: 0.21ml 

-Wiping operation 
Wipes nozzle plate by the rubber part on the right half of the wiper. 

-Flashing operation 

Prevents color from mixing. Stabilizes ink surface inside the nozzle. 

■ CL1' 

- Ink absorption 

Black Ink: 1.02ml, Color Ink: 1.02ml 

-Wiping operation 
Wipes nozzle plate by the rubber part on the right half of the wiper. 

-Flashing operation 

Prevents color from mixing. Stabilizes ink surface inside the nozzle. 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



■ CL2 

- Ink absorption 

Black Ink: 0.51ml, Color Ink: 0.51ml 

-Wiping operation 

Wipes nozzle plate by the rubber part on the right half of the wiper. 

-Flashing operation 

Prevents color from mixing. Stabilizes ink surface inside the nozzle. 

The above mentioned manual CL is executed by performing nozzle check pattern and 
manual CL alternately. The cleaning order is CLl^ CLl'^ CL2^ CL1. 
Like the previous products, CL1 is selected automatically and performed in case any 
print check is not executed between each manual CL. Additionally, if the manual CL is 
performed with over 5 pages printing cycle, CL1 is always selected and performed. 

Additionally, if either black or color I/C is ink low or end condition, any manual 
cleaning is prohibited and it is displayed on the STM3. 

□ Timer Cleaning 

Unlike the previous product, this printer dose not have Timer IC Lithium battery 

which is used for the backup power source for Timer IC. So, this printer manages the 
printer off period or cleaning cycle by using the following method. 

The printer driver sends the time command to the printer every D4 command 
transportation. The time command is generated based on the PC's timer and it consists 
of year and month, date, hour, minutes, second. As soon as the printer receives the 
time command from the printer driver, it is compared with the latest cleaning time 
which is stored in the 6A<H>, 6B<H> address of the EEPROM. And if the timer 
cleaning period is over the specific period, the printer perform the timer cleaning 
automatically and store the time command in the 6A<H>,6B<H> address of the 
EEPROM. In case the timer cleaning period is not over the specific period, the time 
command is not stored in the EEPROM and it is abandoned. Maximum 0.48ml of the 
ink is consumed in the Timer cleaning. (0.24ml of each black and color ink is 
consumed.) 



□ Flashing 

This printer performs the following two kinds of the Flashing for the following 
purpose. 

■ Periodical Flashing 

This is due to avoid the increment of both ink' s viscosity in the printhead nozzle 
during the continuous printing and the specific small amount of the ink is ejected 
in the cap based on the periodical flashing timer. 

■ Periodical large amount Flashing 

This is due to avoid the increment of black ink's viscosity in the printhead nozzle 
during the continuous printing and large amount of the ink is ejected in the cap 
based on the periodical large mount flashing timer. 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.1.8 Printing mode 

The print resolution and printing method are determined automatically by setting the 
media type and print quality (It is able to set by slider bar) in the printer driver as 
following table. Following table show you the detail setting in the "Auto" mode. 

Table 2-5. Printing mode for Color mode 



Table 2-6. Printing mode for Black mode 



Print media Slide bar Resolution Print mode ,^ Dotsize*2 

Speed*! weave 


Plain paper 


Speed 


120x120 


Economy 


ON 


OFF 


ND-3dot 


Default 


360 x 360 


Normal 360 


ON 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


ON 


ON 


VSD 6pl 


360 dpi Inkjet 
paper 


N/A 


360 x 360 


Normal 360 


OFF 


ON 


MSD2 


Photo Quality 
ink jet paper 


Default 


360 x 720 


Fine 360 


OFF 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Matte Paper- 
Heavyweight 


Default 


360 x 720 


Fine 360 


OFF 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Photo paper 


Default 


360 x 720 


Fine 360 


OFF 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Photo Quality 
Glossy Film 


N/A 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Ink Jet 

transparencies 


N/A 


360 x 360 


Normal 360 


OFF 


ON 


MSD2 



Print media Slide bar Resolution Print mode c ° l:fc1 Dotsize*2 

Speed*! weave 


Plain paper 


Speed 


120 x 120 


Economy 


ON 


OFF 


ND-3dot 


Default 


480 x 240 


Normal 240 


ON 


ON 


MSDl 


Quality 


360 x 720 


Fine 360 


ON 


ON 


MSD2 


360 dpi Inkjet 
paper 


N/A 


360 x 360 


Normal 360 


OFF 


ON 


MSD2 


Photo Quality 
ink jet paper 


Default 


360 x 720 


Fine 360 


OFF 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Matte Paper- 
Heavyweight 


Default 


360 x 720 


Fine 360 


OFF 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Photo paper 


Default 


360 x 720 


Fine 360 


OFF 


ON 


MSD2 


Quality 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Photo Quality 
Glossy Film 


N/A 


720 x 720 


Photo 720 


OFF 


ON 


VSD 6pl 


Ink Jet 

transparencies 


N/A 


360 x 360 


Normal 360 


OFF 


ON 


MSD2 



NOTE: *7: High speed means Bi-directional printing. 

*2: ND means Normal dot. MS means Multi Shot Dot. 
VSD means Variable Shot dot. 



NOTE: *7 : High speed means Bi-directional printing. 

*2: ND means Normal dot. MS means Multi Shot Dot. 
VSD means Variable Shot dot. 



Operating Principles 



Overview 



EPSON Stylus COLOR 480 



Revision B 



2.2 Electrical Circuit Operating Principles 

The electric circuit of the Stylus COLOR 480 consists of the following boards. 

□ Main board: C367MAIN-B Board (C367MAIN Board* 1) 

□ Power supply board: C367 PSB/PSE Board 

NOTE: C367MAIN board is used for the product in the first mass production 
and it will be changed to C367MAIN-B board at an early date. 
The major difference is that C 367 MAIN -B has one chip CPU which 
include the ASCI function. This section describes the operation 
principle ofC367MAIN-B 

This section provides operating principles of C367MAIN-B Board and C367 PSB/PSE 
Board. Refer to Figure 2-16 for the major connection of the each boards and their 
roles. 




Printer Mechanism 



CR Motor 



PF Motor 



Head Driver Board 



HP/PE/IC Sensor 



2.2.1 C367 PSB/PSE board 

The power supply boards of Stylus COLOR 480 use a RCC (Ringing Chalk Converter) 
circuit, which generates +42VDC for drive line and +5VDC for logic line to drive the 
printer. The application of the output voltage is described below. 

Table 2-7. Application of the DC Voltages 



Voltage 1 Application 


+42VDC 


• Motors (CR Motor, PF Motor) 

• Printhead common voltage 

• Printhead nozzle selector 42V drive voltage 


+5VDC 


• C367MAIN control circuit logic 

• Sensor 



This printer dose not have the Power SW. So, the printer is turned on when the AC 
cable is connected to the AC inlet. If the AC cable is disconnected from the AC inlet, 
this power supply circuit supply 5 voltage for approximately 70us to keep the logic 
circuit. 

AC voltage input from AC inlet first goes through filter circuit that removes high 
frequency components and is then converted to DC voltage via the rectifier circuit and 
the smoothing circuit. DC voltage is then lead to the switching circuit and FET Ql 
preforms the switching operation. By the switching operation of the primary circuit, 
+42VDC is generated and stabilized at the secondary circuit. This +42VDC generated 
by the secondary circuit is converted to +5 VDC by the chopping regulator IC of the 
secondary circuit. 



Figure 2-16. Electric Circuit 



Operating Principles 



Electrical Circuit Operating Principles 



EPSON Stylus COLOR 480 



Revision B 



+42 VDC 

a 



+5 VDC 



+42VDC over 
current protectior 



IC51 



ZD53 



+5V Regulator 



+5VDC Line 
Over Voltage 
Limitation 



ZD52,87 



d 



F51 



+42VDC Line 
Over Voltage 
Limitation 



D51 



R92,R93,Q91,ZD51 



+42VDC Line 
Constant Control 



C51 



Smoothing 
Circuit 



PC1 



Photo 
Coupler 



TRANS(T1) 



C11 



Q1 



Smoothing 
Circuit 



Q2,Q3 



Main Switching 
Circuit 



Abnormal 
Feed back circuit 



AC Input 



Over Current 
Protection 



Filter Circiut 



Full Wave 
Rectifier circuit 



DB1 



Figure 2-17. C301PSB/PSE Board Block Diagram 

The C367 PSB/PSE board has the various control circuits to stop voltage output if a 
malfunction occurs on the power supply board or the main board while the printer 
mechanism is on duty. Following explains each control and protection circuit. 

□ +42 V line constant voltage control circuit: 

The output level of +42 V line is monitored by a R92, R93,Q91,ZD51. 
When + 42V line reaches about 42.5V, ZD51 has a continuity with and PCI start 
the operation via Q91. Consequently, Ql switching operation is controlled by this 
circuit to stabilize the 42V line. 



+42Vline over voltage protection circuit: 

The output voltage line is monitored by ZD52,ZD87. If the output level of the 
voltage level of +42DC line exceeds +48V, this circuit stops the operation of the 
switching FET Ql via PC1,Q82,Q83 and prevents high voltage from applied to the 
secondary side 

+42Vline over current protection circuit: 

The output voltage is monitored by the F5 1 . When the abnormal current is 

detected by F5 1 , F5 1 is fused and cut off the +42 V line output to the Main board 

+5V line constant voltage control circuit/+5V line over current protection circuit: 
The output level of the +5 VDC line voltage is monitored by the regulator IC5 1 . If 
abnormal voltage is detected, the information is fed back to the internal 
comparator. 

+5V line over voltage protection circuit: 

The output voltage level of the +5V line is monitored by ZD53. 
If the output level of the voltage level of +5DC line exceeds +7 V, this circuit 
stops the operation of the switching FET via PCl,Q82,Q83and prevents high 
voltage from applied to the secondary side. 



Operating Principles 



Electrical Circuit Operating Principles 



EPSON Stylus COLOR 480 



Revision B 



2.2.2 C367MAIN-B Board 

The printer mechanism is controlled by C367MAIN-B. On this MAIN board, 3.3V 
regulator IC is not mounted and all IC is driven with 5.0 V. 
See Figure for the C367MAIN-B board block diagram. 



P-ROM 4M 
(IC3) 



D-RAM 1M 
(IC4) 



E01A14NA 
CPU(IC1) 



Reset IC 
(IC6) 



EEPROM 
(IC5) 



Motor Driver 
(IC8) 



Motor Driver 
(IC9) 



Common Driver 
(IC7) 



Parallel l/F IC 
(IC 10) 




_fj HP/PE/IC Sen 
n CR Motor 

D PF Motor 



Q1 & Q2 |CN4 | - 

[ 



CN6 Parallel l/F 



"W 



Figure 2-18. Block Diagram for the C367MAIN-B Board 



2.2.2.1 Main elements 

Table 2-8 shows the function of the each main elements on C367MAIN-B. 

Table 2-8. Main Elements 



IC 1 Location 1 Function 


CPU 

E01A14NA 


IC1 


16bit CPU mounted on the MAIN board is driven by 
clock frequency 24MHz and controls the printer. 


PROM 


IC3 


• Capacity 4MB, Bus= 16 bit 

• Program for CPU 


RAM 


IC4 


Bus=16bit, 1Mbit DRAM 


AT93C46 


IC5 


lkbit EEPROM 

• Default value setting 

• Parameter backup 


LA5623M 


IC6 


Reset IC 

• For +5V; reset when +4.2V is detected 

• For +42 V, reset when +33.2 is detected 


E09A17RA 


IC7 


Head drive control HIC 

• Generates head common voltage. 


LB 1845 


IC8 


CR motor drive IC 


LB 1845 


IC9 


PF motor drive IC 


74LS07 


IC10 


IEEE1284 parallel l/F transceiver IC. 



Following shows you the major characteristic of this main board. 

□ Timer IC & Lithium battery are not mounted 

Unlike the previous products, the Timer IC and the Lithium battery are not 
mounted on the Main board. So, this product perform the Power-on cleaning or 
Timer cleaning based on the time command which is sent from the printer driver. 
As for the detail, refer to the 2.1.7 Ink Sequence. 

□ D-RAM 

1Mbit D-RAM is mounted on the Main board. 

□ One CPU controls the all function on the main board. 



Operating Principles 



Electrical Circuit Operating Principles 



EPSON Stylus COLOR 480 



Revision B 



2.2.2.2 Printhead Driver Circuit 

The printhead drive circuit consists of the following two components: 

■ Head common driver circuit 

(Common driver IC7 & Wave amplifier transistor Ql, Q2) 

■ Nozzle selector IC on the printhead driver board. 

The common driver (IC7) generates a reference drive waveform according to the 
output signals from the CPU (IC1). The reference drive waveform is amplified by the 
transistors Ql and Q2 and then transferred to the nozzle selector IC on the printhead 
circuit board. Print data is converted to serial data by the CPU and then sent to the 
nozzle selector IC on the printhead circuit board. Based on the serial data, the nozzle 
selector IC determines the nozzles to be actuated. The selected nozzles are driven by 
the drive waveforms generated by the common driver. See Figure 2-19 for the 
printhead driver circuit block diagram. 



+42Va 



HWAO 
HWA1 
HWA2 
HWA3 



IC1 
E01A14NA 



47 28 



46 27 
45 26 
43 25 



39 4 



38 5 



HWCLK1 

HWCLK2 

HWFLR 

HWRST 

HWSDATA 4S_29 

HWSCLK 49 30 

HWSLAT 



HWLAT 
HS01 
HS02 
HCLK 
HNCHG 
HCH 
HSP 
ANO 



37 6 



41 1 



25_ 



wmnm 7/mr 



AO 
A1 
A2 
A3 



VCC45 ==4 
VCC45_2 23 

NPNB ^P— 
FBl8_ 



ir 



IC7 

Commom 
Driver IC 



CLK1 

CLK2 

FLOOR 

RST 

DATA 

DCLK 

E 



GND2 

GND 
GND 
GND 
GND 



30_ 



Nozzle Selecor IC 
IR2C96F 



LAT 

SI1 

SI2 

SCK 

NCHG 

CH 

SP 

THM 



Head Drive 
Pulse 



Head common driver circuit 

The reference head drive waveform is generated in the common driver (IC7) based 

on the following 1 1 signal lines output from the CPU (IC1); A0-A3, CLK1, CLK2, 

FLOOR, RST, DATA, DCLK, and E. 

Based on the DATA signal output from the CPU (IC1), the original data for the 

head drive waveform is written in the memory in the common driver (IC7). 

The addresses for the written data are determined by the AO - A3 signals, and, of 

among, data used to determine the waveform angles is selected and appropriate 

head driver waveform is generated. Generated head drive waveform is transferred 

to nozzle selector IC on the head driver board and applied to the nozzle PZT 

specified by nozzle selector IC. 

Head nozzle selector circuit 

Printing data are allocated to the two rows, the number of the head nozzle rows, 
and converted into serial data by the CPU (IC1). Then the converted data is 
transferred to the nozzle selector IC through the two signal lines (SIO to SI2). 
Data transmission from the CPU to the nozzle selector synchronizes with the SCK 
clock signal and the LAT signal. Referring to the transferred data, nozzles to be 
activated are selected, and the PZTs of the selected nozzles are driven by the drive 
waveform output from the head common driver. 



Figure 2-19. Printhead Driver Circuit 



Operating Principles 



Electrical Circuit Operating Principles 



EPSON Stylus COLOR 480 



Revision B 



2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit 

The motor driver IC (IC9) on the MAIN board drives PF motor. This product uses 4- 
phase 48-pole hybrid type stepping motor and performs constant current bi-polar drive. 

CPU (IC1) converts PF motor phase control signal to LB 1845 micro step drive form 
and outputs to motor driver IC (IC9) LB 1845 from port 12, 17. Based on this signal, 
IC9 determines the phase mode. 

The current value on each phase is determined by CPU (IC1) and outputs from port 13, 
14, 15, 16, to driver IC (IC9). Motor driver IC generates motor driver waveform based 
on these input signals and controls the motor. If the printer dose not receive any data 
from PC for 5 minutes, CPU set the motor drive current to via port 13, 14,15,16 and 
the motor drive is turned off to save the power consumption. 



2.2.2.4 CR Motor Driver Circuit 

The motor driver IC (IC8) on the MAIN board drives PF motor. This product uses 4- 
phase 48-pole hybrid type stepping motor and performs constant current bi-polar drive. 

CPU (IC1) converts PF motor phase control signal to LB 1845 micro step drive form 
and outputs to motor driver IC (IC8) LB 1845 from port 139, 144. Based on this signal, 
IC8 determines the phase mode. 

The current value on each phase is determined by CPU (IC1) and outputs from port 
140, 141, 142, 143, to driver IC (IC8). Motor driver IC generates motor driver 
waveform based on these input signals and controls the motor. If the printer dose not 
receive any data from PC for 5 minutes, CPU set the motor drive current to via port 
140, 141,142,143 and the motor drive is turned off to save the power consumption. 



E01A14NA 
(IC1 ) I 

PFIA2 




777 




Figure 2-20. PF Motor Driver Circuit Block Diagram 



Figure 2-21. CR Motor Driver Circuit Block Diagram 



Operating Principles 



Electrical Circuit Operating Principles 



EPSON Stylus COLOR 480 



Revision B 



2.2.2.5 Reset Circuit 

Reset circuits consist of the rest IC (IC6). Reset circuits are mounted on the MAIN 
board to monitor the two voltages: +5V for the logic line and +42 V for the drive line. 
When each circuit detects abnormality on the corresponding line, it outputs a reset 
signal to reset CPU (IC1). This function is necessary to prevent the printer from 
operating abnormally. This IC monitors both +5V and +45 lines but can reset them 
independently. The reset circuits outputs reset signal when +5V line becomes 4.2V or 
lower or +42 V line becomes 33.2V or lower. 

Unlike the previous products, the timer IC is not built in the reset IC and the Lithium 
battery also is not equipped on the main board. 



2.2.2.6 EEPROM Control Circuit 

Since EEPROM is nonvolatile memory, it keeps written information if the printer 
power is turned off. When the printer is turned ON, CPU (IC1) reads data from 
EEPROM (IC5) and when the power is turned OFF it stores data to EEPROM. 

Information stored in EEPROM is listed below. 

■ Various ink counter (I/C consumption counter, waste pad counter, etc.) 

■ Mechanical setting value (Head ID, Bi-D adjustment, USB ID, etc.) 

See Table 7-7, "EEPROM Address Map," on page 131 that provides detailed 
information on the values stored in EEPROM. 



A 


+42V 








I 


+5V 
















1 
2 


IC6 
_ LA5623M-TE-L 




8 


128 




IC 1 
E01A14NA 


_ 


^ 






P85 




T 


IN VCC 
NC2 OUT1 
GND OUT2 


7 




> 

129 


NMI 
XRESET 


t 




3 

4 


6 


^ =j 


5 


130 














I I 






■x 


7- 






I I 











Figure 2-22. Reset Circuit Block Diagram 



Main signal lines are explained below; 

■ OUT1: Interrupt signal 

■ OUT2: Reset line 

■ IN: +42 V line monitoring line 

■ VCC: +5V line monitoring line 



















+1 

> 

< 


5V 


8 


AT93C46 
(IC5) 


1 


135 


E01A14NA 
(IC1) 




VCC cs 
NC SK 
ORG Dl 
GND DO 


ECS 
ECK 
EDI 
EDO 


7 
6 


2 


134 


3 


133 






5 


4 


132 


1 










J^ 



















Figure 2-23. EEPROM Circuit Diagram 

EEPROM is connected to CPU with 4 lines and each line has the following function. 

■ CS: Chip selection signal 

■ CK: Data synchronism clock pulse 

■ Dl: Data writing line (serial data) at power off. 

■ DO: Data reading line (serial data) at power on. 



Operating Principles 



Electrical Circuit Operating Principles 



EPSON Stylus COLOR 480 



Revision B 



2.2.2.7 Sensor Circuit 

C367MAIN-B is equipped with the following two sensors to detect the status of the 
printer. Unlike the previous product, ASF HP sensor is not equipped on the ASF and 
the ASF HP is determined with the clutch mechanism (2.1.4 Paper Feeding 
Mechanism). 

□ HP/PE/IC Sensor 

This sensor uses photo interrupter method and detects the following three status. 
The photo interrupt component and two detection levers consists of this sensor. 

■ CR home position 

The CR home position is detected on the right edge of the CR shaft with the HP/ 
PE/IC sensor during the power on sequence. In case the CR home position is 
detected in the power on sequence, this sensor outputs HIGH signal to the CPU. 
When the LOW signal is output to the CPU in the detection position, the CR unit 
is out of home position. 

■ .Ink cartridge installation condition. 

When the printer is powered on, the CR unit moves to the left side with the 
specific steps. And in case the plate molded on the Ink cartridge cover push the 
sensor detection lever, the sensor detects that the ink cartridge is not installed in 
the CR unit and outputs HIGH signal. 

When the ink cartridge is installed in the CR unit, the plate molded on the ink 
cartridge cover dose not contacts with the sensor detection lever and the LOW 
signal is outputs to the CPU. The Ink cartridge installation condition is monitored 
in the ink cartridge replacement sequence also. 

■ Paper Top & End position 

When the Paper is in the paper path, this sensor outputs the HIGH signal. 
When the Paper is not in the paper path, this sensor outputs the LOW signal. 
This status is always monitored during the printer is in the power on status with 
this sensor. 

□ Thermistor (THM) 

The thermistor is attached directly on the printhead driver board. It monitors the 
temperature around the printhead and determines the proper head drive voltage 
according to the ink viscosity that varies by the temperature. This information is 
fed back to the CPU analog port. When the temperature rises, the head drive 
circuit lowers the drive voltage: When the temperature lowers, the head drive 
circuit rises the drive voltage. 



The block diagram for the sensor circuit is shown below 



ici L- 

E01A14NA 



SWHPPE 



ANO 



+5V i VW- 



+5V 



+5V< |h 



*c 



v 



s. 



32 



-II— k 



Hj> 



PV 



GND 

2 



CN1 
HP/PE/IC Sensor 



HPPE 






22 



777 1 



GND 



THM 



CN4 
Head FFC 



Figure 2-24. Sensor Circuit Diagram 



Operating Principles 



Electrical Circuit Operating Principles 




TROUBLESHOOTING 



EPSON Stylus COLOR 480 



Revision B 



3.1 Overview 



This chapter describes how to identify troubles in two levels: unit level repair and 
component level repair. Refer to the flowchart in this chapter to identify the defective 
unit and perform component level repair if necessary. This chapter also explains motor 
coil resistance, sensor specification and error indication. 





START 






v 




Unit level Troubleshooting 


ir 


Unit repair 


ir 


Assemble & Adjustment 




i 


f 






END 







Table 3-1. Motor, Coil Resistance 


Motor 


Location 


Checkpoint 1 Resistance 


CR Motor 


CN2 


Pin 1 and 3 
Pin 2 and 4 


10.8 Ohms ± 10% 
(at 25 °C/ phase) 


PF Motor 


CN3 


Pin 1 and 3 
Pin 2 and 4 


10 Ohms ±10% 
(at 25 °C/ phase) 



Table 3-2. Sensor Check Point 



Sensor Name 


Check Point 


Signal Level 


Switch Mode 








Off 






Less than 0.7V 


• Out of HP range 

• No paper 

• Detect the I/C 


HP/PF/TC Sensor 


CN1/Pin 1 and 2 












On 






More than 2.4V 


• Within HP range 

• Detect the paper 

• Not detects the I/C 


Thermistor 
(THM) 


TH1 (on the Head 
driver board) 


Analog signal 


10 K (at 24 °C) 



Figure 3-1. Troubleshooting Flowchart 



Troubleshooting 



Overview 



EPSON Stylus COLOR 480 



Revision B 



Condition 



No Paper 
Paper is not 
loaded correctly 



Table 3-3. Error Indication 



Status Monitor 3 Indication 



Paper Jam 



■=> 



Microsoft Word - figR1.rtf 



Paper is not loaded correctly. ^j 

Reload the paper, then click the continue button. 
Click Cancel to stop any print jobs. I 



Continue 



1 aiicel 



Black Ink 
T013 



i ° 01 ™ £n 



Figure 3-2. Paper is not loaded correctly 




Paper is jammed. 

Click the Eject button to eject any jammed paper. 
If paper is still jammed inside the printer, click the 
Stop button, open the printer cover and remove the 



3 



Eject 



Z-M-lp 



-Ink Levels — 




i 


( 'I 






Black Ink "L Color Ink " 

T013 :■ Ton : 


_ 




/ 





Figure 3-3. Paper Jam 



Generic 
Remedy 



1) Reload the 
paper, then 
click the 
"Continue" 
button. 

2) If you want 
cancel the print 
job, click the 
"Cancel" 
button. 



1) Click the 
"Eject" button 
to eject any 
jammed paper. 

2) If the paper 
is still jammed 
inside the 
printer, click 
the "Stop" 
button to 
cancel the print 
job. Then, 
open the 
printer cover 
and remove the 
jammed paper. 



Condition 



Ink Out 



Ink Low 



Table 3-4. Error indication 



Status Monitor 3 Indication 



Black ink is out. 

Black : TT013 

Replace the black ink cartridge. Click the [How 

to...] button for instructions on replacing ink 



1 



-Ink Levels — 


Color Ink 
T014 I 












jQf| 


I 


/ 



Figure 3-4. Ink out 



Vl 



Black ink is low. 

Black:T013 

Click the [How to...] button for instructions on 

changing the ink cartridge now. 



~3 
J 



Black Ink 
T101 3 



§ 



Color Ink 
TT014 



Figure 3-5. Ink low 

NOTE: If this error is indicated on the 
monitor, you can continue the 
printing until the I/C becomes ink 
out condition. However, the head 
cleaning operation can not be 
done so that the remaining ink is 
low condition. Refer to Figure 3-6 
on the next page. 



Generic 
Remedy 



1) Click the 
"How to" 
button and 
replace the I/C 
by following 
the procedure. 



1) Click the 
"How to" 
button and 
replace the I/C 
by following 
the procedure. 



Troubleshooting 



Overview 



EPSON Stylus COLOR 480 



Revision B 



Table 3-5. Error indication 



Condition 


Status Monitor 3 Indication 


Generic 
Remedy 


• Head cleaning 
can not be 




Click "Yes" 
button and 




completed. 


_/C\ Head Cleaning can not be completed because ink is low or out. 


replace the 




I/Cby 




Do you wish to replace the ink cartridge now? 


following the 
procedure. 


Yes |[ No : 

1 | _ 1 


Figure 3-6. Head cleaning caution 


• Head alignment 




Use the Print 


(bi-d) was not 


1 EPSON Stylus COLOR 480 \~ 


head alignment 


performed. 


Initial print head alignment was not performed during printer setup. 
Use the Print Head Alignment utility on the printer driver's Utility 
menu to align the print head before printing again. 


utility on the 
printer driver 
utility menu to 
align the print 
head 


|[ OK ;| 






Figure 3-7. Print head alignment was 






not performed 






NOTE: This error message is indicated 






only this adjustment was not 






performed in the Set up utility. 






Once, this adjustment is 






performed, this indication is not 






indicated again. 





Condition 



Communication 
Error 



• General Error 



Table 3-6. Error indication 



Status Monitor 3 Indication 



Microsoft Word - fiMR1.rtf 




A communication error has occurred. 

Click OK and then check the interface cable type. 
all cable connections and make sure that all 



1 op 







Color Ink 
T014 



Figure 3-8. Communication error 




A general error has occurred. 

Click the [Clear] button to clear all print data from 
the Spool Manager. Pemove any foreign objects, 
packing materials, or jammed paper from inside the 



i 



Figure 3-9. General error 



Generic 
Remedy 



1) Check the 
correct printer 
driver is 
selected in the 
printer setting. 

2) Check the 
parallel I/F 
cable is 
connected 
correctly. 

3) Disconnect 
the AC cable 
and connect it 
again. 



Motors or 
circuit boards 
may be broken. 
Find out the 
failure parts by 
referring to the 
"Unit level 
troubleshootin 



Troubleshooting 



Overview 



EPSON Stylus COLOR 480 



Revision B 



Table 3-7. Error Indication 



Condition 



Waste Ink pad 
overflow Error. 



Status Monitor 3 Indication 




Unplug your printer and contact your deale 

.authorised service center. 



Figure 3-10. Waste Ink Error 



Generic 



Remedy 



Replace the 
Waste drain 
ink pad with 
new one and 
reset the Waste 
drain ink pad 
counter 
(Protection 
counter A) by 
using the 
Service 
Adjustment 
program. 



Troubleshooting 



Overview 



EPSON Stylus COLOR 480 



Revision B 



3.2 Unit Level Troubleshooting 



Table 3-8. Symptoms and possible cause (continued) 



You can identify the troubles, using the checklist in this section and then find defective 

parts. When you find out defective parts, replace them by referring the Chapter 4 

"Disassembling." 

In your repair activity, connect the printer to your PC and check the Status monitor 3 

by identify the trouble because this printer dose not have control panel. Based on the 

Status monitor 3 indication or phenomenon, check the printer more detail by referring 

the corresponding check table. 



Table 3-8. Symptoms and possible cause 




Symptom 1 Possible Cause 1 Check table 


Paper out error indication on 
STM3 (Paper is not loaded 
correctly) 


• The friction of the LD roller is lowered due 
to the paper dust. 

• The clutch mechanism is broken. 

• Tension spring 0. 143 come off in the clutch 
mechanism. 

• Compression spring 0.98 comes off. 

• Tip of Change lever has any damage. 

• PF motor is broken 


Table 3-9 
Table 3-10 
Table 3-11 


Paper jam error indication 
on STM3 


• Star wheel assembly is not assembled on 
the Paper eject frame. 

• The Spur gear 15 is not assembled 
correctly 

• The paper guide front is not assembled 
correctly or has any damage. 

• The PE detection lever dose not move 
smoothly 


Table 3-12 
Table 3-13 
Table 3-14 


Multiple papers are always 
loaded. 


• The paper return plate dose not work 
correctly. 


Table 3-15 


Paper is always loaded 
without any print job 


• The Change lever is broken in the Clutch 
mechanism. 


Table 3-16 



Symptom 1 Possible Cause 1 Check table 


General error indication on 
the STM3 


• HP/IC sensor lever or PE sensor lever dose 
not move smoothly. 

• HP/PE/IC sensor is defective. 

• CR motor is defective. 

• PF motor is defective 

• Main board is defective. 

• Printer Housing dose not secured with 
screw on -the printer mechanism 


Table 3-17 
Table 3-18 
Table 3-19 


Communication error on the 
STM3 


• The main board is defective 

• The power supply board is defective. 

• The parallel cable dose not support the bi- 
directional transportation. 

• The suitable print driver is not installed into 
the PC. 


Figure 3-20 


Any error indication is not 
displayed. But, the paper is 
not ejected completely. 
Paper jam dose not occur. 


• Paper eject roller gear is disengaged from 
the pump's gears. 

• The Paper eject frame is not assembled in 
the Paper eject frame. 


Figure 3-21 


Dot missing occur and it is 
not recovered with CL 


• Pump unit dose not absorb the ink from the 
printhead. 

• Cap unit dose not stick on the surface of the 
printhead completely. 

• The printhead is broken 

• The head FFC has any damage. 

• The main board is defective. 


Figure 3-22 
Figure 3-23 
Figure 3-24 


Print quality is not good 

• Vertical banding 

• Horizontal banding 

• Printing is blurred 

• Ink stains the paper 


• The accuracy of the CR motor is lowered. 

• The lack of the lubricant around the CR 
unit. 

• The both I/C is not held in the CR unit 
securely. 

• The Paper eject frame is deformed. 

• Any foreign material is sticking around the 
printhead. 

• Paper feed accuracy is lowered. 

• Printer driver setting is not suitable. 

• Paper path has ink stain somewhere. 


Table 3-25 
Table 3-26 
Table 3-27 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



If the problem fits to the detail phenomenon in the table, make sure the check point and 
repair the product following the corresponding remedy mentioned in the table when 
you find the defective parts in the check point. 

Table 3-9. Paper out error indication on STM3 



Table 3-10. Paper out error indication on STM3 



Paper out error indication on STM3 



Detail phenomenon 



Check point 



Check the surface of 
the LD roller if the 
micro pearl or severe 
smear is adhered. 



ASF LD roller attempt 
to load the paper. 
But, paper is not 
loaded at all. The LD 
roller seems slipping. 




If it is no problem, 
proceed the next step 



Remedy 



• Set a cleaning sheet in 
the ASF up side down. 
Then holding the top 
edge, try to load the 
paper from the Printer 
driver. The micro pearl 
on the LD roller surface 
is removed. To remove 
severe smear, staple a 
cloth moistened with 
alcohol to a post card 
and clean the roller in the 
same manner. 



Non-adhesive Area 



Adhesive Area 
This side down 



(Use a post card 
for the base sheet.) 



Staplers 

Cloth moistened 
with alcohol 



If the problem is not 
solved, replace the LD 
roller with new one. 



Paper out error indication on STM3 



Detail phenomenon 



ASF LD roller dose not 
attempt to load the 
paper. But, the PF 
motor and the Spur 
gear 35.2 is rotating. 



Check point 



Check if the clutch 
tooth is broken. 




If it is no problem, 
proceed the next step. 



1 . Check if the tension 
spring 0.143 comes off 
in the Clutch 
mechanism. 



Remedy 



Replace the clutch 
mechanism with new 
one. 



1. Se the tension spring 
0.143 in the clutch 
mechanism. 



ASF LD roller dose not 
attempt to load the 
paper. But, the PF 
motor and the Spur 
gear 35.2 is rotating. 



2. Set the Compression 
spring 0.98 in the 
Change lever. 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-11. Paper out error indication on STM3 



Table 3-12. Paper jam error indication on STM3 





Paper out error indication on STM3 


Step 
No. 


Detail phenomenon Check point 


Remedy 






1 . Check if the tip of the 


1 . Replace the Change 






Change lever has any 


lever with new one. 




When the print data is 


damage. 




1 Change lever 




P^r* 'V 




sent to the printer, ASF 








LD roller continue to 


^ 






load the paper even if 


^^K. * <^m 




4 


the first paper is loaded 
to the PF roller and the 
paper is ejected while 
the ASF hopper is 


| '•""""^ 






comp. spring 0.98 




2. Set the Compression 


2. Check if the 






flapping. 


Compression spring 
0.98 comes off from 
the Change lever 

If it is no problem, 
proceed the next step. 


spring 0.98 in the 
Change lever. 






1 . Check if the PF motor 


1 . Connect the PF motor 






connector is connected 


connector to the CN3 on 


5 


When the printer is 
turned on, ASF hopper 
dose not operate at all 
in the power on 
sequence 


to the CN3. 
2. Check if the PF motor 
coil resistance is about 
7ohm by using tester 
Refer to Table 3-1. 


the Main board. 

2. Replace the PF motor 
with new one. 

3. If the problem is not 
solved, replace the Main 
board with new one. 



Paper Jam error indication on STM3 



Detail phenomenon 



Check point 



Check if the star wheel 
assembly is assembled 
in the Paper eject 
frame. 



Remedy 



Paper is not ejected 
completely and 
jammed around the 
Paper eject frame. 




If it is no problem, 
proceed the next step 



Check if the Paper 
eject roller is rotating 
correctly. 



Ditto 




If it is no problem, 
proceed the next step 



Remove the jammed 
paper and assemble the 
Star wheel assembly in 
the Paper eject frame 
completely. 

If the hook portion of the 
Star wheel assembly is 
broken, replace the Star 
wheel assembly with 



Set the tip of the Spur 
gear 15 to the protrusion 
of the Pump unit and 
assemble it correctly. 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-13. Paper jam error indication on STM3 



Table 3-14. Paper jam error indication on STM3 



Paper Jam error indication on STM3 



Detail phenomenon 



The paper is jammed 
around the Front paper 
guide. 



Check point 



1. Check if the Front 
paper guide is floating 
from the assemble 
position. 

2. Check if there is any 
damage around the 
rear edge of the each 
rib on the Front paper 
guide. 



Remedy 



1. Assemble the Front 
paper guide front to the 
suitable portion and 
confirm the PF grounding 
spring is securing the 
Front paper guide. 




2. Replace the Front paper 
guide with new one. 



Paper is loaded 
correctly from ASF. 
But, after complete the 
print job, paper jam 
indicated on the screen 
without any paper jam. 
If you send the new 
printjobinthis 
condition, the General 
error is indicated on 
the screen., 



If it is no problem, 
proceed the next step 



Check if the Torsion 
spring 0.22 comes off 
on the both PE sensor 
lever. 




If the Torsion spring 
0.22 is not set on the 
correct position, set it 
correctly. If any paper 
dust is placed around the 
PE sensor lever, remove 
it 



If it is no problem, 
proceed the next step 



Paper Jam error indication on STM3 


** p Detail phenomenon 


Check point 


Remedy 




When the paper is 


1. Check if the CN1 


1. Connect the CN1 




loaded from the ASF 


connector cable for HP/ 


connector cable to the 




and ejected without 


PE/IC sensor cable is 


CN1 on the Main board. 




any printing. After 
eject the paper, 
paper eject sequence 
is continued. 


disconnected on the 
Main board or sensor. 




5 


2. Check if the HP/PE/IC 
sensor operates 
correctly by using the 


2. Replace the HP/PE/IC 
sensor with new one. 




If any print job is 


tester. Refer to Table 






sent to the printer, 
General error is 
displayed on the 
STM. 


3-2. 


3. If the problem is not 
solved, replace the Main 
board with new one. 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-15. Multiple papers are always loaded 



Table 3-16. Paper is always loaded without any print job 



Multiple papers are always loaded. 



Detail phenomenon 



Any error indication is 
not displayed on the 
monitor. But, multiple 
papers are always 
loaded from ASF. 



Check point 



Check if the Paper return 
plate is operating 
correctly in the ASF 
when the paper is loaded. 



Remedy 



Assemble the torsion 
spring 28.9 in the ASF 
frame. 




Paper is always loaded without any print job 
N p Detail phenomenon Check point Remedy 


1 


Paper is always loaded 
from ASF without any 
print job. 


1 . Check if the tip of the 
Change lever has any 
damage. 


1 . .Replace the Change 
lever with new one. 

2. Set the Compression 
spring 0.98 in the 
Change lever. 


ASF hopper 
continue to flapping 
when the printer is 
turned on. 


1 Change lever 1 


p^ 


comp. spring 0.98 


2. Check if the 

Compression spring 
0.98 comes off from 
the Change lever 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-17. General Error indication on the STM3 



General Error indication on the STM3 



Detail phenomenon Check point 



1 . Check if the Torsion 
spring 0.22 comes off 
on the both HP/IC 
sensor lever. 
HP/IC sensor lever 



When the printer is 
turned on, the printer 
continue the paper 
eject sequence even if 
the paper is not in the 
paper path. 




2. Check if the Torsion 
spring 0.22 comes off 
on the both PE sensor 
lever. 




Check if the CN1 
connector cable is 
connected on the CN1 
on the Main board or 
sensor. 

Check if the HP/PE 
sensor work correctly 
by using the tester. 
Refer to Table 3-2 



Remedy 



1 . Set the Torsion spring 
0.22 on the HP/IC sensor 
lever. 



Set the Torsion spring 
0.22 on the PE sensor 
lever. 



3. Connect the CN1 
connector cable to the 
CN1 on the Main board. 

4. Replace the HP/PE/IC 
sensor with new one. 



If the problem is not 
solved, replace the Main 
board with new one. 





Table 3-18. General Error indication 


on the STM3 




General Error indication on the STM3 


Step 
No. 


Detail phenomenon 


Check point 


Remedy 






1. Check if the CR 


1 . Connect the CR motor 






motor connector is 


connector to the CN2 on 






connected CN2 on the 


the Main board. 






Main board. 






When the printer is 


2. Check if the coil 


2. Replace the CR motor 


2 


turned on, the CR unit 


resistance of the CR 


with new one. 


dose not move at all in 


motor is about 7.8ohm 






the power on sequence. 


by using the tester. 
Refer to Table 3-1. 


3. If the problem is not 
solved, replace the Main 
board with new one. 






1 . Check if the PF motor 


1 . Connect the PF motor 






connector is connected 


connector to the CN3 on 


3 


When the printer is 
turned on, PF roller 
dose not rotate at all in 
the power on sequence. 


totheCN3. 
2. Check if the PF motor 
coil resistance is about 
7ohm by using tester 


the Main board. 

2. Replace the PF motor 
with new one. 

3. If the problem is not 
solved, replace the Main 
board with new one. 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-19. General Error indication on the STM3 



Table 3-20. Communication error on the STM3 



General Error indication on the STM3 



Detail phenomenon Check point 



1 . Check if the Top 
housing is secured with 
the fixing screw at the 
front side. 



When the printer is 
turned on, it sounds 
strange noise and the 
CR unit is stopped 
around the CR lock 
lever. 



Top housing 




Check if the Change 
lever is placed to the 
printer front side. 



Change lever 




Check if the PF motor 
is operated. Check the 
CN3 connector and the 
coil resistance for PF 
motor. 

If the CR lock lever is 
not released even if the 
PF motor rotate in the 
power on sequence, 
check if one of the 
gears has any damage 
in the PF motor torque 
transportation path. 
Refer to Figure 2-14. 



Remedy 



1. Secure the Housing 
fixing screw at the printer 
front side. 



2. Turn back the Change 
lever to the printer back 
side with the tweezer or 
small screw driver. 



3. Connect the PF motor 
cable to CN3 on the 
Main board. 
Replace the PF motor 
with new one. 

4. Change the damaged 
gear with new one. 



5. If the problem is not 
solved, replace the Main 
board with new one. 





Communication Error on the STM3 


Step 
No. 


Detail phenomenon 


Check point 


Remedy 






1. Check if neither CR 


1. Replace the PS board 






motor nor PF motor 


with new one. 


1 


When the printer is 
turned on, printer dose 


work at all when the 
printer is turned on. 






not operate at all. 




2. If the problem is not 
solved, replace the main 
board with new one. 






1. Check if the Parallel 


1 . Replace the Parallel I/C 






I/F cable supports the 


cable with the suitable 






bi-directional 


one. 






transportation. 








2. Check if the PC 


2. Change the setting of 






support bi-directional 


Bi-d communication in 






communication. 


the BIOS of the PC. 




When the printer is 


3. Check if SC480 
printer driver is used 


3. Install the SC480 printer 
driver in the PC. 




turned on, power on 


for the print job. 






sequence is operated 
correctly. But, when 
any print job is sent to 
printer, 

communication error is 
indicated on the 


4. Check if the incorrect 


4. Write down 01 <H> data 


2 


model name is stored 
in the 02<H> address 


into the 02<H> address 
of the EEPOM by using 




oftheEEPROMinthe 
Main board. 


the Dump.exe program. 




monitor. 


5. Check if scan monitor 


5. Close the scan monitor 






is installed in the PC 


in the Windows task bar 






and it is active. 


or overwrite the latest 
ESCPCSCAN.DLL. 

6. If the problem is not 
solved, replace the main 
board with new one. 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-21. Paper is not ejected completely without any error indication 



Paper is not ejected completely without any error indication 



Table 3-22. Dot missing occur and it is not recovered with CL 



Dot missing occur and it is not recovered with CL 



Detail phenomenon 



Printing is normal. 
But, the paper is not 
ejected completely and 
the bottom area stay 
around the Paper eject 
frame. 



Check point 



1 . Check if the Paper 
eject roller rotate when 
the paper is ejected. 



Check if the Paper 
eject frame is secured 
with the three fixing 
screws to the Main 
frame. 



Remedy 



1. Assemble the Spur gear 
1 5 to the protrusion on the 
pump unit. 



Detail phenomenon 




Secure the Paper eject 
frame witt the two fixing 
screws to the Main 
frame. 




In the CL sequence, 
the pump unit seems 
work correctly. But, 
ink is not ejected to the 
waste ink pad at all. 
Moreover, any ink is 
not absorbed from the 
head to the cap. 



Check point 



1 . Check if ink is ejected 
to the waste ink pad via 
pump unit in the CL 
sequence. 

2. Check if there is any 
foreign material 
around the seal rubber 
parts on the cap 
assembly. 



■?~ 



v */> 



Cap seal rubber 
parts 



3. Check if any damage 
is observed around the 
seal rubber parts on 
the cap assembly. 

4. Check if the two 
compression spring 
are assembled in the 
Cap assembly 
correctly. 



Remedy 



1 . If ink is not ejected at all 
to the waste ink pad in the 
CL sequence, proceed the 
following check point 2). 

2. Remove the foreign 
material around the seal 
rubber parts. 



3. Replace the Cap 

assembly with new one. 



Set the Compression 
spring into the Cap 
assembly. 




Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 



Table 3-23. Dot missing occur and it is not recovered with CL 



Dot missing and it is not recovered with CL 



Detail phenomenon 



In the CL sequence, 
the pump unit seems 
work correctly. But, 
any ink is not ejected 
to waste ink pad. 
Moreover, any ink is 
not absorbed from the 
head to the cap. 




Check point 



5) Check if the Pump 
tube is connected to 
the bottom of the Cap 
assembly correctly 



6) Check if the pump tube 
has a little slack 
between the Cap 
assembly and the pump 
unit when the Cap 
assembly is slide up 
completely. 




Remedy 



5) Connect the Pump tube 
to the bottom of the Cap 
assembly deeply. 



6) Pump unit may coil the 
pump tube inside the unit. 
In this case, pull out the 
coiled tube from the 
pump unit carefully. 
After that, connect the 
pump tube to the Cap 
assembly after placing 
the tube correctly. 



7) If the problem is not 
solved, replace the Pump 
unit with new one. 



Table 3-24. Dot missing occur and it is not recovered with CL 




Dot missing occur and it is not recovered with CL 


Step 
No. 


Detail phenomenon 


Check point 


Remedy 




In the CL sequence, 
ink is ejected to the 
Waste ink pad (this 
means pump unit & 


1 . Check if the segment 
in the nozzle check 
patter is reduced every 
CL & Nozzle check 


1. Replace the I/C with 
new one in the I/C 
replacement sequence. 


2 


cap unit are working 


pattern printing. 




correctly). But, the dot 


2. Check if any damage 


2. Replace the Head FFC 




missing is not solved at 


is observed on the 


with the new one. 




the specific nozzles 


Head FFC. 






even if the several CLs 
are performed. 




3. Replace the printhead 
with new one. 


3 


In the CL sequence, 
ink is ejected to the 
Waste ink pad. But, dot 
missing is occurred on 


1. Check if the Head 
FFC is connected to the 
CN4 on the Main board 
or Head FFC. 


1. Connect the Head FFC 
securely to the CN4 on 
the Main board or 
Printhead. 


all nozzle in the 




2. Replace the Printhead 




printing and is not 




with new one. 




solved in the several 




3. Replace the Main board 




CLs. 




with new one. 



Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 







Table 3-2 


15. } 


Print quality is 


not good 


Print quality is not good 




N Detail phenomenon Check point 


Remedy 






1. Check if each 


1 . Perform the CL and 






segment is printed 


check the nozzle check 






correctly in the nozzle 


pattern. 






check pattern. 


2. Clean the surface of the 






2. Check if the surface of 


CR guide shaft with the 






the CR guide shaft 


dry soft cloth and 






dose not have any 


lubricate G-55 inside the 






sever stain. 


CR guide shaft. Refer to 
Figure 6-4. 


1 


Vertical banding is 
appeared against the 
CR movement 
direction. And it looks 
like uneven printing. 


3. Check if the surface of 
the CR sliding portion 
on the Paper eject 
frame has enough oil. 


3. Clean the surface of the 
CR sliding portion on the 
Paper eject frame and 
lubricate specific amount 
oftheG-26. 

Refer to Figure 6-8. 

4. Reassemble the CR 




«. "vm y 


- - ^ ' 






_ hi jm* ^? ^ 


mrff 




aft^fe'^^ W"**- 




^^ i^^^m^am^a 


CRmov 
direc 


ement 
tion 


- 




/ 


; 3\ 








G26 lubrication 








4. Check if the CR guide 








shaft is assembled in 


guide shaft into the 








the correct portion 


mounting slat on the 








securely. 


both side frame and 
secure it with Rod 










spring. Figure 4-50 and 








Figure 4-5 1 . 






5. Check if the surface of 


5. Replace the CR guide 






the CR guide shaft is 


shaft with new one. 






flat. 








6. Check if the surface 


6. Replace the Paper eject 






of the Paper eject 


frame with new one. 






frame is flat. 









Table 3 


-i 


16 


. Print quality i 


is not good 




Print quality is not good 




Step 
No. 


Detail phenomenon Check point 


Remedy 






7) Check if the rubber 
parts are stuck inside the 


7. Stick the rubber parts 
inside the I/C cover. 






I/C cover. 


8) Replace the following 


1 


Ditto 




parts. 

• CR motor 

• CR timing belt 

• Compression spring 15.7 






1 . Check if each segment 


1. Perform the CL and 






is printed correctly in 
the nozzle check 


check the nozzle check 
pattern, by using the 






pattern. 


Adjustment program. 






2. Check if the suitable 


2. Use the suitable paper 




Micro banding appears 
horizontally against the 
paper feeding direction 
and it appears with the 
same width. 


paper is used 
according to the 
printer driver setting. 

3. Check if the Paper 
feed roller is dirty. 

4. Check if the following 


according to the printer 
driver setting. 

3. Clean the surface of the 
PR roller carefully with 
the soft brush 


2 








parts do not have any 
damage. 


4. Replace the damaged 
parts with new one. 






CR movement 
direction 




• Combination gear 8.4, 
21.6 

• Combination gear 
9.6,33.6 

• Spur gear 35.4. 

• Spur gear 15 


5. Replace the Printhead 
























■ 






>j 


(i 


with new one. 






Km-' J 


• 1 

« 

• 













Troubleshooting 



Unit Level Troubleshooting 



EPSON Stylus COLOR 480 



Revision B 





Table 3-27. Print quality is not good 


Print quality is not good 


Step 
No. 


Detail phenomenon Check point 


Remedy 






1. Check if the suitable 


1 . Use the suitable paper 






paper is used according 


according to the driver 






to the printer driver 


setting. 


3 


Printing is blurred. 


setting. 
2. Check if the correct 


2. Input 6 digits code of 






head ID is stored in the 


the head ID into the 






EEPROM by using the 


EEPROM by using the 






Adjustment program. 


Adjustment program. 






1 . Check if the following 


1 . Clean the ink stained 






parts are stained with 


parts with soft cloth 






ink. 








• Upper paper driven 
roller 








• PF roller 








• Paper guide front 








• Paper eject roller. 




4 


Ink stains the paper 


2. Check if there is some 
ink drops around the 
backside of the 
printhead. 


2. Wipe off the ink drop 
with the soft cloth 
carefully. 






3. If the bottom area of 
the printed paper has 
ink stain, check if the 


3. Secure the screws fixing 
the Paper eject frame. 






Paper eject frame is 
secured with three 








screws. 








4. If the bottom area of 
the printed paper has 
ink stain, check if the 


4. Replace the Paper eject 
frame with new one. 






Paper eject frame is 
bent upward. 





Troubleshooting 



Unit Level Troubleshooting 




DISASSEMBLY AND ASSEMBLY 



EPSON Stylus COLOR 480 



Revision B 



4.1 Overview 



This section describes procedures for disassembling the main components of the Stylus 
COLOR 480. Unless otherwise specified, disassembly units or components can be 
reassembled by reversing the disassembly procedure. Things, if not strictly observed, that 
could result in injury or loss of life are described under the heading "Warning". Precautions 
for any disassembly or assembly procedures are described under the heading "CAUTION". 
Chips for disassembling procedures are described under the heading "CHECK POINT". 
If the assembling procedure is different from the reversed procedure of the disassembling, 
the procedure is described under the heading "REASSEMBLY". 
Any adjustments required after disassembling the units are described under the heading 
"ADJUSTMENT REQUIRED". When you have to remove any units or parts that are not 
described in this chapter, refer to the exploded diagrams in the appendix. 

Read precautions described in the next section before starting. 



4.1.1 Precautions 

See the precautions given under the handling "WARNING" and "CAUTION" in the 
following column when disassembling or assembling EPSON Stylus COLOR 480. 



WARNING 




Disconnect the power cable before disassembling or assembling 

the printer. 

Wear protective goggles to protect your eyes from ink. If ink gets 

in your eye, flush the eye with fresh water and see a doctor 

immediately. 

If ink comes into contact with your skin, wash it off with soap and 

water. If irritation occurs, contact a physician. 

A lithium battery is installed on the main board of this printer. Be 

sure to observe the following instructions when serving the 

battery: 

1 . Keep the battery away from any metal or other batteries so that 
electrodes of the opposite polarity do not come in contact with each 
other. 

2. Do not heat the battery or put it near fire. 

3. Do not solder on any part of the battery. (Doing so may result in 
leakage of electrolyte from the battery, burning or explosion. The 
leakage may affect other devices close to the battery.) 
Do not charge the battery. (An explosion may be generated inside the 
battery, and cause burning or explosion.) 

Do not dismantle the battery. (The gas inside the battery may hurt your 
throat. Leakage, burning or explosion may also be resulted.) 
Do not install the battery in the wrong direction. (This may cause 
burning or explosion.) 

Danger of explosion if the battery is incorrectly replaced. Replace 
only with the same or equivalent type recommended by the 
manufacture. Dispose the used batteries according to 
government's law and regulations. 



4. 



5. 



6. 



Disassembly and Assembly 



Overview 



EPSON Stylus COLOR 480 



Revision B 



CAUTION 



I 



CAUTION 



I 



Risque d'explosion si la pile est remplacee incorrectment. Ne 
remplacer que par une pile du meme type ou d'un type equivalent 
recommande par le fabricant. Eliminer les piles dechargees selon 
les lois et les regies de securite en vigueur. 



Never remove the ink cartridge from the carriage unless this 

manual specifies to do so. 

When transporting the printer after installing the ink cartridge, 

be sure to pack the printer for transportation without removing 

the ink cartridge. 

Use only recommended tools for disassembling, assembling or 

adjusting the printer. 

Apply lubricants and adhesives as specified. (See Chapter 6 for 

details.) 

Make the specified adjustments when you disassemble the printer. 

(See Chapter 5 for details.) 

When assembling, if an ink cartridge is removed and needs to be 

installed again, be sure to install a new ink cartridge because of 

the following reasons; 

1 . Once the ink cartridge mounted on the printer is removed, air comes in 
and creates bubbles in the cartridge. These bubbles clog ink path and 
cause printing malfunction. 

2. If an ink cartridge in use is removed and is reinstalled, ink quantity 
will not be detected correctly since the counter to check ink 
consumption is cleared. 

Because of the reasons above, make sure to return the printer to 
the user with a new ink cartridge installed. 



4.1.2 Tools 

Use only specified tools to avoid damaging the printer. 



Name 1 Supplier 1 Parts No. 


Phillips Screw Driver (No.l) 


EPSON 


B743800100 


Phillips Screw Driver (No. 2) 


EPSON 


B743800200 


Nipper 


EPSON 


B740500100 


Tweezers 


EPSON 


B741000100 



Disassembly and Assembly 



Overview 



EPSON Stylus COLOR 480 



Revision B 



4.1.3 Work Completion Check 

If any service is made to the printer, use the checklist shown below to confirm all works are 
completed properly and the printer is ready to be returned to the user. 

Table 4-1. Work Completion Check 




Main Unit 



Adjustment 



Self-test 



On-line Test 



Printhead 



Carriage 
Mechanism 



Paper Feeding 
Mechanism 



Specified 
Adjustment 



Is the operation normal? 



Is the printing successful? 



Is ink discharged normally from 
all the nozzles? 



Does it move smoothly? 



Is there any abnormal noise 
during its operation? 



Is there any dirt or foreign 
objects on the CR Guide Shaft? 



Is the CR Motor at the correct 

temperature? 

(Not too heated?) 



Is paper advanced smoothly? 

• No paper jamming? 

• No paper skew? 

• No multiple feeding? 

• No abnormal noise? 



Is the PF Motor at correct 
temperature? 



Is the paper path free of any 
obstructions? 



Are all the adjustment done 
correctly? 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



□ Checked 

D Not necessary 



Table 4-1. Work Completion Check (continued) 



1 Item 1 Checkpoint 1 Status 
cation 1 1 1 


Lubrication 


Specified 
Lubrication 


Are all the lubrication made at 
the specified points? 


□ Checked 

D Not necessary 


Is the amount of lubrication 
correct? 


□ Checked 

D Not necessary 


Function 


ROM Version 


Version: 


□ Checked 

D Not necessary 


Packing 


Ink Cartridge 


Are the ink cartridges installed 
correctly? 


□ Checked 

D Not necessary 


Protective 
Materials 


Have all relevant protective 
materials been attached to the 
printer? 


□ Checked 

D Not necessary 


Others 


Attachments, 
Accessories 


Have all the relevant items been 
included in the package? 


□ Checked 

D Not necessary 



Disassembly and Assembly 



Overview 



EPSON Stylus COLOR 480 



Revision B 



4.2 Disassembly 



The flowchart below shows step-by-step disassembly procedures. When disassembling 
each unit, refer to the page number shown in the figure. 





Upper Housing 
removal 






Page 72 
















1 




i 




1 




1 




1 








1 




Printhoad removal 




CR Motor 
removal 




Circuit board 

removal 




Waste Drain Ink 
Pad unit removal 




Removing the 
LD Roller unit 




Removing the 
Paper Eject Roller 




CR unit removal 




ASF frame unit 
disassembling 




Page 73 


Page 75 


Page 76 


Page 80 


Page 82 


Page 89 


Page 93 


Page 96 










































































PF Motor removal 




Ink System unit 

removal 




Mam Board unit 
removal 




PS Board unit 

removal 




LD Roller removal 




Removing the 

PF Roller unit 




Page 81 


Page 87 


Page 76 


Page 76 


Page 82 


Page 91 








1 




■ 






















1 






1 








Cap unit removal 




Pump unit removal 




HP/PE/IC Sensor 
removal 






Page 87 


Page 87 


Page 85 





Figure 4-1. Disassembling Flowchart 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.1 Housing removal 

1. Open the printer cover and remove 1 screw (C.B.P-TITE R 3x6 R/Uc screw) at the 
printer front side. 



F^ — 


. 


■ i 
II 

// 


■JV .,, .J 






ift. ,■- ,K ,KySr ,■* ,V 


^ 












^m. 


C.B.T-TITE R 3X6 R/Uc screw 





Figure 4-2. Removing lscrew for Housing 

2. Remove 1 screw (CBS. 3x6 F/Zn screw) at the back of the printer and remove the 
Housing. 




REASSEMBLY 




■ Tightening Torque for screw 

• C.B.P-TITE R3x6 R/Uc screw for housing front side: 6 +/- lkgf.cm 

• C.B.S 3x6 F/Zn screw for housing back side : 6+/- lkgf.cm 



Figure 4-3. Removing lscew for Housing 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.2 Printhead removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Open the Cover cartridge and remove the both black and color ink cartridges. 

3. Release the Printhead FFC from the cable holder in the left side of the CR unit. 

4. Remove one screw (C.B.P.-TITE 3x6 F/Zn) tightening the Printhead at the left side of 
the CR unit. 



C.B.P-TITE 3X6 F/Zn 




Figure 4-4. Removing the Printhead's FFC 

5. Remove the Printhead from the CR unit taking the following step. 

v. 




6. Disconnect the Printhead's FFC from the connector on the Printhead.] 

Place the Printhead's FFC in the cable holder by the four 

portions indicated in the following Figure4-6. 

Make sure that the Head Grounding Plate is installed to the 

carriage correctly. Refer to Figure 4-7. 

Make sure that two holes of the Printhead correctly fit in the 

installing position pins. Figure 4-7. 





Figure 4-6. Placing the Printhead's FFC 



Figure 4-5. Removing the one screw tightening the Printhead 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 




Figure 4-7. 
Printhead installing the position pin & the grounding plate. 



REASSEMBLY 




Tightening Torque for screw 
C.B.P-TITE 3x8 screw for printhead: 6+/lkgf.cm 




When the Printhead is replaced with a new one, following 
adjustments must be performed in the order below: Refer to 
Pagel08. 

1. Initial ink charge 

2. Printhead ID input 

3. Bi-d adjustment 

When the Printhead is removed and reinstalled, only the following 
adjustment is required. Refer to Pagel06. 

1. Head cleaning 

2. Bi-d adjustment 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.3 CR motor removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Move the CR unit from the CR home position to around the center position. 

3. Push the CR motor from the right to left to slack the CR timing belt. 

4. Take off the CR timing belt from the Pinion gear of the CR motor. 




Figure 4-8. Taking off the CR timing belt. 

5. Remove the Compression spring 15.7 and Holder reinforcement plate between the CR 
motor holder and the protrusion on the Main frame with the tweezers. 




Figure 4-9. Remove the Compression spring 15.7Compression spring 15.7 



6. Slide the CR motor holder along with the CR motor to the left side 



7. Remove the CR motor from the Printer mechanism taking the following step: 

- Slide the CR motor to right side. (Step2) 

- Slide the CR motor to backward to take off the fixing part placing the right side of 
the CR motor. (Step3) 

- Slide the CR motor to the left side to take off the fixing part placing the left side of 
the fixing part. (Step 4). 




Figure 4-10. Removing the CR motor 

8. Take the CR motor' s cable out from the cable hook in the Waste drain ink pad unit. 

9. Disconnect the CR motor connector cable from the CN2 on the Main board with 
tweezers. 

The Gap adjustment (Bi-d adjustment) is required when the CR 
motor is removed or replaced. Refer to Pagell5. 




REASSEMBLY 




Connect the CR motor connector cable to the CN2 on the Main 
board. Use of tweezers or pincers is recommended to facilitate 
the job, since the CN2 is not located near the rear edge of the 
Main board. 

Make sure to set the Holder reinforcement plate with the 
Compression spring 15.7. Refer to Figure4-9. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.4 Circuit board removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove two screws (CB.S. 3x6, F/Zn) securing the Front Housing (Stacker guide) and 
remove the Front Housing (Stacker Guide). 









1 


^jJiV 


L 


Front Housing 
(Stacker Guide) 






CB.S 3x6 F/Zn 




jjj^mi^^ffML^fm mi v ,iiy^p4|i p m*mm 










* 


<? 


*■ 


n 




W 

















Figure 4-11. Removing the Front Housing (Stacker Guide) 

3. Remove two screws (CB.S. 3x6, F/Zn) securing the Circuit board unit at the front side 
of the Printer mechanism. 




Figure 4-12. Removing two screws at the printer front side 



4. Remove four screws (CB.S. 3x6, F/Zn) securing the Circuit board unit at the back side 
of the Printer mechanism and remove two screws (CB.S. 3x6, F/Zn) securing the 
Circuit board unit at the right side (viewed from back side). 




Figure 4-13. Removing six screws at the printer back side & right side 

5. Holding the Left housing lightly, pull down the Circuit board unit. Then disconnect the 
following four cables from the corresponding connectors on the Main board. 

■ CR motor connector cable : CN2 



PF motor connector cable 
Printhead FFC 
HP/PE/IC sensor cable 



CN3 
CN4 
CN1 



6. Remove the following screws securing each circuit board to the Shield plate. Figure 
Figure 4-14. 



C364 MAIN/B : Remove five screws. 
CB.S. 3x6, F/Zn (Red circled screws) 
CP. 3x6, F/Zn (Yellow circled screws) 



: 3pcs (for Main board) 

: 2pcs (for Parallel I/F) connector) 



C364PSB/E : Remove five screws. 

CB.S, 3x6, F/Zn (Yellow circled screws) : 3pcs (for PS board) 

CB.S-TITE R, 3x6, F/UC (Red circled screw) : lpcs (for PS board) 

CB.(0),4x5, F/ZG for 120V (Green circled screw): lpcs (for Earth terminal) 
Hexagon nut, Normal M4(Green circled) : lpcs (for Earth terminal) 

(CB.S Screw 3x6, F/Zn for 220V (Green circled screw): lpcs (for Earth 
terminal)) 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



NOTE: 110V type of the PS board dose not have earth wire. 
Refer to the Figure 4-14 



REASSEMBLY 





Figure 4-14. Remove the screw securing each circuit board. 



I Since the cable between C364 MAIN board and C364 PSB/E 
board are directly soldered, take the following steps when 
replacing only one circuit board in the service activity. 
Take off the cable on the Main board by removing the solder by 
heating it with the soldering iron. 

2. Replace the defective circuit board with new one. 

3. Insert the tip of the cable into the soldering hole of the ASP Main 
board and solder it securely. 

■ Tightening Torque for screw 

C.B.S. 3x6 F/Zn screw for PS board : 6+/- lkgf.cm 

C.B.S TITE R 3x6,F/Uc screw for PS board : 6+/- lkgf.cm 

C.B.S. 3x6 F/Zn screw for Main board : 6+1- lkgf.cm 

C.P. 3x6,F.Zn screw for Parallel I/F connector : 6+/- lkgf.cm 

C.B.S. 3x6 F/Zn screw for Circuit unit : 6+/- lkgf.cm 

C.B.(O) 4x5, F/ZG screw for Earth cable : ll+/-lkgf.cm 




When replacing the Main board with a new one, perform the 
following service items. 

■ Before removing the Main board, connect the parallel I/F 
Cable and try to read out the following data by using the 
Adjustment program. If this operation succeeds, replace the 
Main board and write the read out data to the new Main board 
through the Adjustment program. Refer to Pagelll. 

1) I/C Ink consumption counter. 

2) Waste ink drain pad counter. 

3) Printhead ID input. 

4) Gap adjustment (Bi-d adjustment) 
In case the above mentioned data are not able to be read out from 
the defective Main board, perform the following service items. 

■ Replace the both ink cartridges with a brand new one. 

■ Replace the Waste ink drain pad with a new one. 

■ Input the Printhead ID. 

■ Adjust the Bi-d alignment. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 




When replacing or removing the PS board, be sure to use the 
following suitable screw to secure the PS board. 




H&P 





Figure 4-15. PS board fixing screws. 



Install a new cartridge before sending back the printer to the 

user, since the ink cartridge once taken out can not be used 

again. 

Installation of I/C must be carried out by I/C replacement 

sequence. Otherwise, ink may not eject properly. 

Refer to the PagelOl. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 




Check the Earth terminal and wire position. Refer to the 
following figure. The earth wire for 120V must be placed back 
side of the Heat sinker HT1. And the earth wire for 220V must be 
placed in front of the Heat sinker HT1 as following figure. 




Figure 4-16. Earth terminal and wire position 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.5 Waste drain ink pad unit removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove one screw (C.B.P TITE 3x8 F/Zn screw) on the front right side of the printer, 
(viewed from front side) 




Figure 4-17. Removing one screw securing the Waste ink pad unit 

3. Remove one screw (C.B.P. TITE 3x8 F/Zn screw) and take three cables off from the 
cable hook in the Waste drain ink pad unit as shown in the following figure. 




Figure 4-18. Removing one screws & cables at the back side of the printer 

4. Remove the Waste drain ink pad unit from the printer 




After assembling the Waste drain ink pad unit, be sure to set the 
following three cables in the cable hook in the Waste drain ink 
pad unit. Refer to the Figure 4-18. 

When assembling the Waste drain ink pad unit, be sure to set the 
tip of the waste ink tube in the suitable position of the Waste 
drain ink pad. Refer to the Figure 4-19 



Waste drain ink pad 





REASSEMBLY 




Figure 4-19. Drain ink tube setting position 

When the Waste drain ink pad is replaced with a new one, 

following service item is required. 

■ Waste drain ink counter reset operation. Refer to Pagell6. 



Tightening torque for screw 
C.B.P. TITE 3x8 screw for Waste drain ink pad unit : 9+/1 kgf.cm 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.6 PF motor removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove the Waste drain ink pad unit from the printer. (Section 4.2.5 Waste drain ink 
pad unit removal) 

3. Remove two screws (C.B.S. 3x6,F/Zn screw) securing the PF motor to the Ink system 
frame. 




Figure 4-20. Removing two screws securing the PF motor 

4. Disconnect the connector cable for PF motor from CN3 on the Main board and take the 
cable off from the hook on the Waste drain ink pad. 

5. Remove the PF motor from the right frame. 



REASSEMBLY 




■ Since the CN 3 is not located near the rear edge of the Main 
board, it is easier to use the tweezers or pincers to connect the 
cable to the CN3. 

■ Tightening torque for screw 

• C.B.S. 3x6 F/Zn screw for PF motor : 9+/1 kgf.cm 




Be sure that the PF motor cable is placed to the backward. Refer to 
the Figure 4-20. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.7 LD Roller removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Take the Head FFC off from the Head FFC holder located along the LD roller shaft 
holder. 




Figure 4-21. Taking Head FFC out from the FFC holder 

3. Remove two screws (C.B.S. 3x6, F/Zn screw) securing the LD roller holder to the 
Main frame. 




4. Push the two hooks of the LD roller shaft holder as shown in the following figure. 

5. Pull the LD roller shaft holder unit upward from the Main frame. 




Figure 4-23. Pushing two hooks of the LD roller shaft holder 

6. Remove the LD roller along with the Clutch mechanism from the LD roller shaft 
holder unit. 







1 LD Roller shaft holder unit 1 




^n 




t i 

-1 


go " ^ 


Clutch mechanism 1 














^^^^_ ■ 1^1 1 LD Roller 1 



Figure 4-24. Removing the LD roller with Clutch mechanism. 



Figure 4-22. Removing two screws securing the LD roller holder 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



CAUTION 



I 



Do not damage the tooth of the Spur gear 35.2 and the 
Combination gear 11.2, 35.2 when assembling the LD roller shaft 
holder unit. 



REASSEMBLY 




Figure 4-25. 
Combination Gear 11.2, 35.2 and Spur Gear 35.2 




Before assembling the LD roller shaft, make sure that the round 
hole of the Clutch is set on the protrusion on the LD roller shaft 
as shown in the following figure. 




Figure 4-26. Assembling the Clutch 

Assemble the LD roller shaft holder unit to the printer 

mechanism in the following procedure. 

1) Set the tip of the Change lever to the printer front side. 




Figure 4-27. LD Roller shaft holder assembling 
procedure (1) 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



REASSEMBLY 




2) Assemble the LD roller shaft holder unit while storing the 
Paper return plate into the ASF frame. 




Figure 4-28. LD Roller shaft holder assembling 
procedure (2) 

Fasten the LD roller shaft holder with two C.B.S 3x6 F/Zn 
screws in the order indicated in the following figure. 

r I i 




Figure 4-29. Fastening the LD roller shaft holder 

Tightening torque for screw 

C.B.S. 3x6 F/Zn screw for LD roller shaft holder unit : 9+/1 kgf.cm 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.8 HP/PE/IC Sensor removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove the LD roller from the LD roller shaft holder. (Section 4.2.7 LD Roller 
removal) 

3 . Remove HP/IC detection lever from the LD roller shaft holder and disconnect the cable 
from the sensor connector. 




Figure 4-30. Removing the HP/IC detection lever 

4. Release the two fixing hooks for the sensor from the LD roller shaft holder and remove 
the sensor. 





Make sure that the Torsion spring 0.22 is hung to the following 
suitable position. 




Figure 4-32. Torsion spring 0.22 for PE sensor lever 




Figure 4-33. Torsion spring 0.22 for HP/IC sensor lever 



Figure 4-31. Releasing two fixing hooks for the sensor 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 




Make sure that the HP/PE/IC sensor cable is placed to the 
suitable groove on the LD roller shaft holder. 




Figure 4-34. Sensor cable placing position (1) 




Figure 4-35. Sensor cable placing position (2) 

Make sure that the each sensor lever turn back smoothly by 
moving it after the sensor was assembled to the LD roller shaft 
holder. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.9 Ink system unit removal (Cap & Pump unit ) 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove the Waste drain ink pad from the printer. (Section 4.2.5 Waste drain ink pad 
unit removal) 

3. Remove three screws (C.B.S. 3x6, F/Zn screw: 2pcs, C.B.S. TITE 3x6, R, F/Uc screw: 
lpcs) securing the Ink system frame and the Cap assembly to the frame. 



CAUTION 



I 




Figure 4-36. Removing three screws securing the Ink system 

4. Remove the Ink system unit (Cap & Pump unit) carefully along with the PF motor & 
Ink system frame. 

CAUTION When the Ink system unit is removed, be careful that the gears do 
not come off from each shaft on the Ink system frame. 



Since the compression spring is included in the Pump assembly, 
watch out for the spring and the gear that pop out from the unit 
when the Pump assembly is removed from the Ink system unit. 
When replacing the cleaner head built in the Pump assembly, be 
careful of the following points. 

1) Do not touch the cleaner head with your bare hands. Ware 
gloves or use tweezers. 

2) Do not smear the head cleaner with oil or grease. 

When installing the Cleaner head, set the rubber side (black side) 
facing toward the right side of the frame. 

When installing the Cleaner head, set the two square cut offs on 
the Cleaner head into the two hooks on the Ink system. 




When replacing the Cap Assembly, do not touch the sealing 

rubber portion of the Cap Assembly. 

The component parts in the Pump Assembly are not individually 

supplied as ASP. So please replace the whole Pump Assembly 

when replacing the Pump Assembly. 

Be careful not to crush or leave any stress on the ink tube 

connecting the pump assembly and the cap assembly. 



5. Release one hook for Cap assembly on the Ink system frame and take the Cap 
assembly out from the Ink system frame. 

6. Disconnect the waste drain ink tube carefully from the bottom of the Cap assembly. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 




Make sure that all gears are set in each gear shaft on the Ink 
system frame. The Combination gear 9.6, 33.6 must be set first on 
the Ink system frame. 



REASSEMBLY 



Combination gear 9.6, 33.6 1 


Spur gear 34.2 


fr.JH ST* 


H^'T^lp 


Combination gear 
12.6, 18.4 


: 




• 


9 / 




Figure 4-37. Gear engagement on the Ink system frame 

Make sure that the ink tube is placed along the following 
position. 




Figure 4-38. Ink tube placing position 

After installing the Pump Assembly, ensure that the cleaner 
parts move back and forth by rotating the Gear. 




■ Tightening torque for screw 

• C.B.S. 3x6 F/Zn screw for Ink system frame & Cap assy.: 9+/1 kgf.cm 

• C.B.S. TITE 3x6 F/Uc screw for Ink system frame : 9+/-1 kgf.cm 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.10 Paper Eject Roller removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove three screws (C.B.S. 3x6, F/Zn screw,:2pcs, C.B.S, 3x5,F/CU screw) securing 
the Front frame to the Main frame. 



4. Slide the Paper eject roller carefully to the left side and remove the Paper eject roller to 
the forward. 



fy 








^^ C.B.S. 3X5, F/CU screw [ 


C.B.S 3X6, F/Zn screw 





Figure 4-39. Removing the Front frame 

3. Lift up the right side of the Front frame and slide it to the left side a little bit and then 
remove it. 

CAUTION When removing the Front frame, if the CR unit is out of the CR 
home position, the nozzle surface of the Printhead may come in 
contact with Paper guide front as soon as the Front frame is 
removed. This is because the CR unit is held with this frame. 
Therefore, be sure to set the CR unit in the CR home position 
before removing the Front frame. Otherwise, the dot missing 
problem may occur. 




Figure 4-40. Slide the Paper eject roller 



CAUTION Do not damage the tooth of the Spur Gear 15, EJ, with the round 
hole on the Main frame. 




Spur Gear 15, EJ 



Figure 4-41. Spur Gear 15, EJ 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 




When you replace the Frame front, make sure to lubricate the 
specific amount of G26 to the Frame front. Refer to the Chapter 
6 Figure6-8. 

When you replace the Paper eject roller with new one, make sure 
to lubricate the specific amount of G26 to the Spur gear 15, EJ. 
Refer to the Chapter 6 Figure6-10. 



REASSEMBLY 




Assemble the Paper eject roller in the following procedure. 
Set the Spur Gear 15, EJ to the cut out hole in the Main frame. 
Set the narrow portions of the shaft in the Paper eject roller to the 
shaft guide holders on the Front paper guide. 
Slide the Paper eject roller to the right side carefully and engage the 
gear with the Combination gear 12.6, 18.4 and the Spur gear 34.2. 
When you assemble the Front frame to the Printer mechanism, 
set the CR unit to the left side and assemble the Front frame 
from the right side. Be careful not damage the CR lock lever. 
Fasten the Front frame with C.B.S. Screw 3x6, F/Zn in the order 
of 1,2,3. 




Tightening torque for screw 
C.B.S. 3x6 F/Zn screw for Front frame : 9+/-1 kgf.cm 
C.B.S. 3x5 F/Uc screw for Front frame : 9+/-1 kgf.cm 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.11 Paper feed roller removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove the Paper Eject roller. (Section 4.2. 10 Paper Eject Roller removal) 

3. Release the PF grounding spring from the Main frame. 




Figure 4-42. Releasing the PF grounding spring 



4. Set the CR unit to the home position. 

5. Release one hook located on the left edge of the Front paper guide. 




6. Lift up the left edge of the Front paper guide while slanting the Front paper guide by 
pulling up its front edge, and then slide the Front paper guide to the left side after 
releasing the right hook on the Front paper guide. 







*5S2^ 


IJMUlft 




Stepl 






Stepl 








Paper guide front 








tu> ^^^M 


h^fc^F 


' •-. 


2^ **-^_ I "' ^i 








Step2 







Figure 4-44. Remove the Front paper guide. 

7. Fit the protrusions of the Left PF roller bushing to the notches in the frames as shown 
in the following figure and remove the PF roller fasten spacer with tweezer. 




Figure 4-43. Release two hooks of the Front paper guide 



Figure 4-45. 
Fit the protrusions of the Left PF roller bushing to each notches 

8. Slide the Left PF roller bushing to right side as above figure Step 2. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



Fit the protrusions of the Right PF roller bushing to the notches in the frames as shown 
in the following figure 



II 


m ; 


I Right PF roller bushing ■ 








^^^ 




Figure 4-46. Fit the protrusions of the Left PF roller bushing to each 

notches 

10. Slide the PF roller to the left side along with the both PF roller bushings and remove 
the PF roller from the printer mechanism. 




After assemble the PF roller, make sure that the dowel of the 
both left and right PF roller bushing holder fit in the cut hole of 
both frames. 

After assemble the Front paper guide to the printer mechanism, 
make sure that the hooks and the dowel pins on the Front paper 
guide is set to the fitting positions secure. Slide the Front paper 
guide to the right side by pushing it and make sure that the right 
hook on the Front paper guide is locked to the frame securely. 
If the Front paper guide is not fixed securely to the suitable 
position, it may cause the paper jam problem. 




Figure 4-47. Front paper guide assembling notice 

When you replace the PF roller with new one, be sure to 
lubricate a specific amount of G-26 between the Left PF roller 
bushing holder and the left edge of the PF roller. Refer to 
Chapter 6 Figure6-5. 



REASSEMBLY 




When you assemble the Paper guide front to the Printer 
mechanism, set the CR unit to the home position and assemble 
the Paper guide front. 

When you assemble the Front frame to the Printer mechanism, 
set the CR unit to the left side and assemble the Front frame 
from the right side. Be careful not damage the CR lock lever. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.12 CR unit removal 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Take the CR timing belt off the CR pinion gear by pushing the CR motor to the left. 




Figure 4-48. Taking the CR timing belt off 

3. Release the Printhead FFC from the cable holders on the LD roller shaft holder. 
And disconnect the Printhead FFC from the connector CN4 on the Main board. 




4. Release two CR guide shaft rod springs from the both hooks on the left and right sides 
of the Main frame. 

Left CR guide shaft rod spring I 




Figure 4-50. Release Left Rod spring for CR shaft 




Right CR guide shaft rod spring 




^7) A 




Figure 4-51. Release Right Rod spring for CR shaft 



Figure 4-49. Taking Printhead FFC off 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



5. Pull the left edge of the CR guide shaft upward to align it with the round cutout 

portion. Then, holding the CR unit by hand, remove the CR guide shaft by sliding it to 
left or right. 





CAUTION 



I 



Figure 4-52. Removing the CR guide shaft 

Remove the CR guide shaft while holding the CR unit by hand. If 
you remove the CR guide shaft without holding the CR unit, the 
nozzle surface of the Printhead may come in contact with the 
Paper guide front, which causes the dot missing problem. 



Unlike the previous products, the oil pad is not built in the CR 

unit. 

Make sure that the tips of the CR guide shaft rod springs are set 

in the holes in the Main frame. 

Make sure that the CR guide shaft rod springs are correctly set 

in the suitable position. Refer to Figure 4-50,Figure 4-51. 

If you disassemble the CR unit after removing the CR unit from 

the printer, make sure that the CR Grounding plate is assembled 

in the suitable position in the CR unit. Refer to Figure 4-53. 

.Make sure that the CR slider is assembled on the CR unit. 




Figure 4-53. Grounding plate assembling position 

If you remove the Printhead from the CR unit, make sure that 

the Head grounding plate is set in the CR unit. Refer to 

Figure4-7. 

Make sure that the groove on the CR guide shaft must be set to 

the left side. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 





If the CR unit is disassembled or replaced with a new one, make 
sure that the CR timing belt is set in the assembling groove 
correctly as following figure. 




Figure 4-54. CR timing belt setting position 

When you replace the CR unit with a new one, lubricate it with 
the suitable amount of the G-55 grease by the specified position. 
Refer to Chapter 6 Figure 6-4. 

When you replace the CR Pulley shaft with new one, lubricate it 
with the suitable amount of G-26 grease by the specific position. 
Refer to Chapter 6 Figure6-6. 

When removing or replacing the CR unit with a new one, adjust 
the Gap (Bi-d). Refer to Pagell5. 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



4.2.13 Disassembling ASF frame unit 

1 . Remove the Housing from the printer. (Section 4.2. 1 Housing removal) 

2. Remove the LD roller shaft holder unit (Section 4.2.7 LD Roller removal) 

3. Remove two screws (C.B.S.-TITE (P4), 3x6, F/Zn screw, C.B.S. Screw 3x6,F/Zn + 
Plain washer 3.2 xlx 7,F/Zn) securing the ASF frame unit and remove the ASF frame 
unit from the printer mechanism. 



C.B.S. Screw 3x6, F/Zn 
Plain washer 3.2xlx7,F/Zn 




Figure 4-55. Removing the screws securing the ASF frame 

4. Remove the following gears from the ASF frame. 

■ Combination gear 1 1 .2, 32.4 

■ Combination gear 22.4, 32 

■ Change lever unit 



Change lever unit 




Combination gear 11.2, 32.4 



Figure 4-56. Removing the Gears from ASF frame unit 

5. Remove the Compression Spring 2.67 located between the ASF Frame and the Hopper, 
and remove the Hopper from the ASF frame. 




Figure 4-57. Removing the Compression spring 2.67 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



6. Remove the Torsion spring 25.7 from the bottom of the ASF frame and the Pad holder 
(Paper return plate). 




Figure 4-58. Removing the Torsion spring 25.7 



7. Remove the Pad holder (Paper return plate) from the ASF frame. 



Pad holder 




maM 




\ 


^ 


\ 








1 


i 


m 






Make sure that the each tip of the Torsion spring 25.7 is set in the 

slot of the Pad holder and ASF frame. Refer to Figure 4-57. 

Make sure that the Pad holder moves smoothly after assembling 

it to the ASF frame. 

Make sure the change lever setting position. Refer to following 

figure. 




Figure 4-60. Change lever setting position 



Figure 4-59. Removing the Pad holder (Paper return plate) 



Disassembly and Assembly 



Disassembly 



EPSON Stylus COLOR 480 



Revision B 



REASSEMBLY 




When you replace the ASF frame or Hopper with the new one, 
make sure to lubricate the specific amount of G26 into the groove 
on ASF frame. Refer to Figure 6-7 & Figure6-9 in the Chapter 6. 
Fasten the ASF unit C.B.S. TITE (P4) 3x6,F/Zn screw (left screw 
in the following figure), Plain washer 3.2xlx7,F/Zn & C.B.S 
3x6,F/Zn screw (right screw in the following figure) in the order 
of following figure. 




Figure 4-61. ASF fixing screws fastening order 

Tightening torque for screw 
C.B.S. 3x6 F/Zn screw for ASF : 9+/-1 kgf.cm 

(right screw in above figure) 

C.B.S. TITE(P4) 3x6, F/Zn screw for ASF : 9+/-lkgf.cm 
(left screw in above figure) 



Disassembly and Assembly 



Disassembly 




ADJUSTMENT 



EPSON Stylus COLOR 480 



Revision B 



5.1 Overview 



This section describes the procedure for adjustments required when the printer is 
disassembled and assembled for repair or service. 

5.1.1 Required Adjustment 

Table 5-1 lists all the necessary adjustments for this printer. If any service listed in this 
table is carried out, all adjustments corresponding to that service item should be 
performed to ensure proper operation of the printer. 

Table 5-1. Required Adjustment 



Performance Priority 


1 


2 


3 


4 


Replacing parts/Service item 


Initial Ink 
Charge 


Head ID 
Setting 


Bi-D 
Adjustment 


Ink pad 

Counter 

reset 


Replacing the Main Board. 


NA 


© 


© 


NA 


Replacing the printhead unit. 


© 


© 


® 


NA 


Replacing the CR motor. 


NA 


NA 


© 


NA 


Replacing or removing the CR 
assembly. 


NA 


NA 


© 


NA 


Replacing the Waste drain ink 
pad 


NA 


NA 


NA 


© 



NOTE: " O": Required Adjustment. The number in the circle shows the 
required adjustment order. 
"NA": Not applicable. 

NOTE: Following adjustments are not required on this product. 

- Platen Gap adjustment 

- Head Angular adjustment. 

- USB ID input 

NOTE: When the Main board is replaced with new one, you may have to 

replace the following parts also in case the EEPROM parameter back 
up function is not available on the defective main board. 

* Waste drain ink pad 

* Both Black & Color Ink Cartridge 



This section describes the detailed procedures of each adjustment by Adjustment 
Program. 

In this printer, it is necessary to set the adjusting information for each printer 
mechanism in order to maintain consistent printing function and quality, eliminating 
differences of each printer mechanism's characteristics. Therefore, in case that the 
combination of the printer mechanism and main board changes or the print head is 
replaced during the repair service, you must set and save the correct information to the 
MAIN board, using the exclusive adjustment program. 

This section describes the detailed procedures of each adjustment by Adjustment 
Program. 



WARNING 




In case any parts is removed and assembled on the repair product 
while running the Adjustment program, turn off the printer certainly. 



Adjustment 



Overview 



EPSON Stylus COLOR 480 



Revision B 



5.1.2 Adjustment Program feature 

This adjustment program is exclusive for Windows: the OS that allows operation of 
this program is Windows 95/98. The following shows programs included in this 
program. 

This adjustment program operates only under Windows 95/98: 
This program does not operate under DOS or Windows 3.X, NT. 
This adjustment program automatically install the appropriate 
program according to your OS. 
Perform this adjustment program using parallel I/F port. 

This adjustment program is composed of following two main programs. 




□ Individual service adjustment program 

This program provides you the adjustment item individually as same as the 
previous adjustment program. The available functions are as following table. 

Table 5-2. Individual service adjustment program 



No. 


Main Menu 


Service 


1 


Adjustment 


Head ID input 


Bi-d adjustment 


2 


Maintenance 


Head cleaning 


Initial ink charge 


Refurbishment for DOA 


Protection counter check / reset 


EEPROM check / write 


3 


A4 check pattern print 


A4 check pattern print 



The user interface of the main menu on this program is shown below. 



Maintenance | Print A4 pattern 
Adjustment 

-Adjustment Item 



r Head voltage ID input 
r Bi-Directional adjustment 



>■ r 




JB 



Adjusted Hem 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Stylus COLOR 480 
Quit | Get status | 



~J 



Variable shot 

rn 

Protection counter 
value 



Figure 5-1. Individual service adjustment program main menu 



Adjustment 



Overview 



EPSON Stylus COLOR 480 



Revision B 



□ Sequential repair service program 

This program provides you the suitable adjustment order in the program according to 
the repair parts. The available functions are as following table. 

Table 5-3. Sequential repair service program 



The user interface of the Sequential repair service program is as following figure. 



Repair item Included Adjustment item 


1 


Printhead removal 


Head Cleaning, Nozzle check, 
Bi-d adjustment. 


2 


Printhead replacement 


Initial charge, Head ID Input, 
Nozzle check, Bi-d adjustment. 


3 


Main board replacement 


EEPROM Back up, Load on EEPEOM 

or 

Head ID input, Bi-d adjustment, 

Ink pad replacement, I/C replacement 

(default setting, market setting) 


4 


CR Unit replacement or removal 


Bi-d adjustment 


5 


CR Motor replacement 


Bi-d adjustment 


6 


Printer mechanism replacement 


Initial ink charge, Head ID input, Nozzle 
check, Bi-d adjustment 


7 


Waste Ink pad replacement 


Waste ink pad counter reset 



Repi 



^JE\ 



Sequential Repair Service Program 

What do you perform repair item? Select the below. 

1. Printhead removal 

2. Printhead replacement 
Main board replacement 
Carriage unit replacement or removal 
CR Motor replacement 
Printer mechanism replacement 
Waste Ink Pad replacement 







Stylus COLOR 480 


J 


|[ Quit l| MenU | Get status 






J 



Protection counter 
value 



Figure 5-2. Sequential repair service program main menu 

5.1.3 Adjustment Program Installation Procedure 

This adjustment program is in the 3.5 2HD FD. The first FD is the installer disk. When 
you execute Setup.exe, the installation of the program will be started under Windows 
95/98. After installation is completed, the Stylus COLOR 480 icon will be 
automatically made in the program menu. Go "Start" -> "Program" and click the icon 
to start this program. 



Adjustment 



Overview 



EPSON Stylus COLOR 480 



Revision B 



5.1.4 Adjustment Program Initial Setting menu 

You have to input the following four items before entering the adjustment main menu. 

□ Model name (Stylus COLOR 480) 

□ Interface setting (LPT 1 , LPT2, LPT3) 

□ Market (World, ESP, EIO) 

□ Program type (Individual service adjustment program or Sequential repair service 
program) 

Follow the procedure below to input the initial settings. 

1 . When you run this program, the following menu appears. Select the Stylus COLOR 
480 in the screen below. 

33 



3. 



EPSON Printer Service Program 




Model Name 

Interface 

Market 



Program type |LPT3 




Figure 5-3. Model Name Selection 

NOTE: This printer stores model name in the PROM. Therefore, even you select 
the model name in the screen above, model name will not stored in the 
EEPROM. Selecting model name in the screen above determines 
respective special command for each model. 

2. Select the Parallel Interface port number which you connect the printer to your PC as 
above Figure 5-3. 



Select the suitable destination in the market menu. "World" is the standard destination 
setting except the ESP and EIO. The waste drain ink pad life for ESP & EIO product is 
different from World standard. So, you have to select the suitable destination in order 
to set the suitable waste drain ink pad life. This setting is used when the waste drain ink 
pad counter is reset or the main board is replaced with new one in the adjustment 
program. 



rss M-\ ixi 




EPSON Printer Service Program 






Model Name 


Stylus COLOR 480 -_ 




Interface 


LPT1 _-] 




Market 


World ^ 


Program type 






]eio 










OK Quit 













Figure 5-4. Destination Setting 



4. Select the Program type which you will run in the menu. 



EPSON Printer Service Program 



Model Name | Stylus COLOR 480 



Interface 



Market World 






Program type 




Figure 5-5. Program type selection. 



Adjustment 



Overview 



EPSON Stylus COLOR 480 



Revision B 



5.2 Sequential Repair Service Program feature 
5.2.1 Feature 

In this manual, we will explain mainly about the Sequential repair service program. 
This program provides you the suitable adjustment order by selecting the repair item in 
the Sequential repair service program main menu. In this program, following 7 items 
are listed. 

□ Printhead removal 

□ Printhead replacement 

□ Main board replacement 

□ CR unit replacement or removal 

□ CR motor replacement or removal 

□ Printer mechanism replacement 

□ Waste ink pad replacement 




oGQ£/Gfiridi t\6f}ctfr &Qf*\/icQ t^roc/rcim 

What do you perform repair item? Select the below. 

1 . Printhead removal 

2. Printhead replacement 

3. Main board replacement 
Carriage unit replacement or removal 

5. CR Motor replacement 

6. Printer mechanism replacement 

7. Waste ink Pad replacement 



Stylus COLOR 480 

Quit | MenU | G* status | 




Adjusted item 

Head voltage ID 



Bi-D Adjustment 

value 

Mufti shot 1 



Mufti shot 2 
Variable shot 



Protection counter 
value 



~3 



Figure 5-6. Sequential repair service program main menu 

The "Adjusted item" in the right column shows you the adjusted item which executed 
in this program and it is easy to confirm the adjusted value. Additionally, this program 
runs under the D4 (IEEE- 1284.4) protocol. So, this program can get the several error 



status even if the printer is error condition, and can control the printer under the error 
condition. Following explain you the common function of the Sequential repair 
service program. 

□ Quit 

If you want to exit this program, click the "Quit" button. Following menu is 
displayed on the screen. And clicking the "Quit" Button in the following menu exit 
the adjustment program completely. Clicking the "Next" button returns to the Top 
menu (Initial setting menu) of Figure 5-3. 




Figure 5-7. Quit function 

□ Menu 

This function is used to stop the adjustment in the each sequential program and 
clicking this "Menu" button returns to the Sequential repair service program main 
menu of the Figure 5-6. 

□ Get status 

This function is used to get the printer status and following figure is displayed on 
the screen by clicking the" Get status" button. This function can get the printer 
status even if the printer is error condition except the main logic circuit failure, and 
control the printer by using the D4 mode functions. 




IBIack:20%, Cyan: 70%, Magenta: 70%, Yellow: 70% ^\ 
Ready to print. 
J 



Inquire 



Black Ink 

T013 



;□ 



Color Ink 
T014 



* 



rD4 mode functions — 
r Execute Head Cleaning 
C Print Nozzle Check Pattern 
r Exchange Ink Cartridge 
C Resetthe Printer 
C Checkthe Protection counter 



OK 



Figure 5-8. Get status function 

In the next page, we will explain the each function of the "Get Status" function. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



1) Inquire 

Clicking this button, you can get the following printer status. 

■ Ink level of the each ink cartridge 

The available remaining ink amount is displayed with figure of Ink cartridge. 

■ Printer status 

The status monitor can get the following 7kinds of the printer status depend on the 

printer status. 

* Maintenance error, * Paper jam, *Paper out * Fatal error, * Ink low, *Ink end, * 

Printing 

2) Close 

Clicking this button, you can close the Status monitor and can return to the adjustment 
menu. 

3) D4 mode function 

You can perform the following items directly from this menu. 

■ Execute Head cleaning 

The suitable printhead cleaning is performed based on the cleaning order. 
See the "Ink Sequence" on page 41. 

■ Print nozzle check pattern 

This function performs the nozzle check printing. 

■ Exchange ink cartridge 

In this function, you can select which ink cartridge you will exchange, and can 
perform the I/C exchange sequence even if the printer is ink low/end condition. 



i 


Select either Black or Color. 


J 
I 




Close | Inquir 


' I 








Black lr 

T01 


"HI 

k ■ 

1 


Colorink " 

toh ; 





Exchange Ink Cartridge 

r Exchange Black Ink Cartridge 



f 



C Exchange Color Ink Cartridge 



...Perform. ~| 



■ Reset the printer 

This reset function is almost same as the Power on reset and following items are 
reset by this function. 

* Initialize printer mechanism. 

* Clears the input data buffer 

* Clears the print buffer 

* Sets default values except I/F setting. 

■ Check the Protection counter (Waste drain ink pad counter check.) 

In this function, you can check the Waste drain ink pad counter. We recommend 
to use this function to check the counter after complete the repair. 

Basically, you have to click the "Get Status" button to get the printer status. 
But, when any error condition is detected by this program on the connected printer, 
error status is displayed automatically as following figure. 




I The paper is loaded incorrectly in the Automatic Sheet j 
Feeder. Reload the paper, then click the [Continue] 
button. Click [Cancel] to stop any print jobs. 

I J 



mK leveis 

Blackink " Colorink " 

toi3 ; toi4 ; 


WW 



D4 mode functions — 
C Execute Head Cleanin 

T Pr 

C Exchange Ink Cartridge 
r Resetthe Printer 



CAUTION 



I 



Figure 5-10. Error status of Status menu 

This program's status monitor dose not display the "Paper out" error 
status in the Bi-d adjustment even if the paper is out in the ASF. 
When the paper is out in the ASF, this program continues to send the 
paper feed command until the paper is set in the ASF. 



Figure 5-9. Exchange ink cartridge 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



5.2.2 Printhead removal 

When you remove the printhead from the printer mechanism and reinstall the removed 
printhead to the printer mechanism, this repair item should be selected in the 
Sequential repair service program. 

1 . Install the removed printhead to the CR unit on the repair printer mechanism. 

2. Select the "Printhead removal" in the Sequential repair service program. Following 
Printhead removal top menu is displayed. 

Adjusted Item 




Head voltage ID 

I 



Bi-D Adjustment 
value 

Multi shot 1 



Protection counter 
value 



Figure 5-11. Printhead removal program menu 

3. Clicking the "Powerful cleaning" displays the following message and instructs you to 
install the brand-new I/C. 




4. Click the "Yes" button starts the Powerful CL in order to eject the air bubbles from 
the printhead cavity. In this function, CL1' is performed and about 1/8 ink of the 
brand-new Black I/C and 1/18 ink of the brand-new Color I/C are consumed. 



















Adjusted Item 

Head voltage ID 




1 1 


Bi-D Adjustment 


Initial ink charge has completed 




value 

Multi shot 1 

Multi shot 2 
Variable shot 

Protection counter 
value 

I 1 


Stylus COLOR 480 


Powerful cleaning (CLT) is completed. 


J 


Quit | MenU Get status 






J 





Figure 5-13. Powerful cleaning 

5. For the next step, click the "Nozzle check" to check the nozzle condition. 
After print the nozzle check pattern, following message is displayed. 




Figure 5-14. Confirmation message for nozzle condition 

6. If any segment in the nozzle check pattern has dot missing, click the "Yes" button to 
perform the powerful cleaning again. If all segment is printed correctly, click the "No" 
button to proceed the Bi-directional adjustment function. 



Figure 5-12. Confirmation message for the brand-new I/C installation 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



7. Click the Bi-directional adjustment to adjust the Bi-directional printing alignment. 
In the following menu, select the suitable print mode which you want to adjust, and 
click the "Print" button. Basically, select all printing mode for the 1st adjustment. 




Bi-Direction Adjustment 



After checking suitable mode, click the [Print] button 

Item 

P Black Multi shot 1 

P Black Multi shot 2 

I* Blacl Variable shol 




:on. 



Adjusted Item 

3 



Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Protection counter 
value 



Figure 5-15. Bi-d adjustment menu 



By clicking the "Print" Button in the above menu, following message is displayed. 
Set the paper in the ASF by following the message and click the "OK" button to start 
the printing for the Bi-directional alignment check pattern. 



Information 



V 



Set new paper on the paper tray. 



OK 




Figure 5-16. Setting the new paper in the ASF 



The current setting is printed at the center of the 5kinds of the Bi-d 
adjustment pattern. So, check the center pattern and select the most 
aligned pattern number. 



Select the most aligned pattern number in the printed pattern and input the number in 
the following menu. 





Bi-Direc tion Ad jus tm en t 

After entering Bi-D Adjustment data, click the [Retry] button or 


Adjusted Item 

Head voltage ID 


[Finish] button. 




Bi-D Adjustment 
value 

Multi shot 1 

Multi shot 2 
Variable shot 

Piotection countei 
value 

I I 


Black Multi shotl : tJ ( -60 - 60 ) 


Black Multi shot2 : | tJ(-6Q~ 60) 


Black Variable shot: ^(^0-60} 
Retry Finish 


Stylus COLOR 4S0 
Quit Menu Get status 


J 





Figure 5-17. Input the suitable pattern number 

10. After input the suitable pattern number, click the "Retry" button to return the Bi- 
directional check alignment +pattern print menu of Figure 5-15. When the "Print" 
button is clicked for the 2nd check pattern printing, following message is displayed 
When the same paper used for 1st check pattern printing is set in the ASF and click the 
"OK" button in the following message, printer advances the paper automatically under 
the 1st printed pattern and the 2nd check pattern is printed from the position. 




Figure 5-18. Setting the same paper in the ASF 

1 1 . Repeated Step 7) to Step 10) to adjust the Bi-directional print alignment completely. 
If you exit this Bi-directional print alignment program, click the "Finish" button on the 
above Figure 5-17 or Click the "Menu" button. 

12. Click the "Get status" button and check the waste drain ink pad counter in this 
function. If the waste drain ink pad counter is around the limit counter, replace the pad 
and reset the counter according to the customer request. 

13. Click the "Menu" button to exit the program. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



5.2.3 Printhead replacement 

When you replace the printhead with new one, this repair item should be selected in the 
Sequential repair service program. 

1 . Replace the Printhead with the new one and select the "Printhead replacement" item in 
the Sequential repair service program menu. Following "Printhead replacement" menu 
is displayed. 




Figure 5-19. Printhead replacement program menu 

2. Click the "Head voltage ID Input" in the above menu. The screen below appears 

Input the 6digits code by referring the head ID label stacked on the Printhead and click 
the "OK" button. 



Head voltage ID input 



Enter the 6 digit voltage ID. 



OK 




■ -I lx| 



Adjusted Item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 
Variable shot 



- | 



Protection counter 
value 



Stylus COLOR 480 
Quit I Menu I Getst* 






Figure 5-20. Head voltage input menu 



NOTE: If you input the incorrect digits code for the Head voltage ID menu, 
following error message is displayed. 



l-l lx| 



Head voltage ID input 

head ID 



Enter the 6 digit voltage ID 



. 



OK 




Adjusted Item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Protection counter 
value 



Stylus COLOR 480 
Quit I Menu I »**« 



The Number of digit is wrong. 



Figure 5-21. Error message for incorrect Head voltage input (1) 



■-i 1*1 



E 



Head voltage ID Input 

head ID 



Enter the 6 digit voltage ID 



OK 




Adjusted Item 

Head volta ge ID 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 
Variable shot 



Protection counter 
value 



Stylus COLOR 480 
Quit I Menu I Get status I 



Second Digit is wrong. 



Figure 5-22. Error message for incorrect Head voltage input (2) 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



3. After complete the Head voltage ID input, the following screen is displayed. 



l-l ll 




Stylus COLOR 480 
Quit | Menu | Get status | 



Adjusted Item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 

Multi shot 2 
Variable shot 



CD 



Protection counter 
value 



As head actuator voltage, Q2SYQ2 has been Zl 

written in EEPROM. 



Figure 5-23. Initial ink charge function 



6. After complete the Initial ink charge, following message is displayed. 






Phnthead Replacement 

Head voltage ID input has completed 

Initial ink charge has completed 




Stylus COLOR 480 



Quit Menu Get status 



Initial ink charge has completed 



■ -I II 




Adjusted item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 
Variable shot 



Protection counter 
value 

I I 



Figure 5-25. Nozzle check pattern function 



4. For the next step, select the "Initial ink charge" in the above menu. Following message 
is displayed. Install the band-new I/C to the printer by following the message. 




Figure 5-24. Confirmation message for brand-new I/C installation 

5. After install the brand-new I/C, click the "OK" button to perform the Initial ink charge 
in order to fill out the printhead cavity with the ink. 

In this sequence, about 1/2 ink of the brand-new black I/C and 1/6 ink of the brand-new 
color I/C are consumed. And it takes about 110 seconds. 



7. Click the "Nozzle check" in the above menu to check the nozzle condition. After print 
the nozzle check pattern, following message is displayed. 




Figure 5-26. Confirmation message for nozzle condition 

If any segment in the nozzle check pattern is missing, click the "Yes" button to 
perform the powerful cleaning. If all segment is printed correctly, click the "No" 
button to proceed the Bi-directional adjustment function. 



If you click the "No" button, the program proceed the I/C exchange sequence. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



Click the Bi-directional adjustment to adjust the Bi-directional printing alignment. 
In the following menu, select the suitable print mode which you want to adjust, and 
click the "Print" button. Basically, select all printing mode for the 1st adjustment. 



Bi-Direction Adjustment 

After checking suitable mode, click the [Print] button. 

Item 

w Black Multi shot 1 



St} 

PS 




W Black Multi shot 2 
W Black Variable shn 



Adjusted item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 

Multi shot 2 
Variable shot 

Protection counter 
value 



Stylus COLOR 480 

MenU I Get stat 



Figure 5-27. Bi-d adjustment menu 

10. By clicking the "Print" Button in the above menu, following message is displayed. 
Set the paper in the ASF by following the message and click the "OK" button to start 
the Bi-directional check pattern printing. 



Information 



V 



Set new paper on the paper tray. 



OK 




Figure 5-28. Setting the new paper in the ASF 



The current setting is printed at the center of the five Bi-d adjustment 
patterns. So, check the center pattern and select the most aligned 
pattern number. 



1 1 . Select the most aligned pattern number in the printed pattern and input the number in 
the following menu. 





Bl-Direc tion Ad jus tm en t 

After entering Bi-D Adjustment data, click the [Retry] button or 


Adjusted Item 

Head voltage ID 


[Finish] button. 




Bi-D Adjustment 
value 

Multi shot 1 

Multi shot 2 
Variable shot 

Piotection countei 
value 

I I 


Black Multi shotl : jj{^0-60} 


Black Multi shot2 : | -^{-60-60} 


Black Variable shot : -d ( SO - 60 ) 
Retry Finish 


Stylus COLOR 4S0 
Quit Menu Get status 


J 



Figure 5-29. Input the suitable pattern number 

12. After input the suitable pattern number, click the "Retry" button to return the Bi- 
d irectional check pattern print menu of Figure 5-27. When the "Print" button is 
clicked for the 2nd check pattern printing, following message is displayed. 
When the same paper used for 1st check pattern printing is set in the ASF and click the 
"OK" button in the following message, printer advances the paper under the 1st check 
printed pattern and the 2nd check pattern is printed on from the position. 



Jx| 


$ 


Set the 


same paper 


on the 


paper 


tray. 


f OK '" 









Figure 5-30. Setting the same paper in the ASF 

13. Repeat Step 9) to Step 12) to adjust the Bi-directional print alignment completely. 

If you exit this Bi-directional print alignment program, click the "Finish" button on the 
above figure or click the "Menu"button. 

14. Click the "Get status" button and check the waste drain ink pad counter in this 
function. If the waste drain ink pad counter is around the limit counter, replace the pad 
and reset the counter according to the customer request. 

15. Click the "Menu" button to exit the program. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



5.2.4 Main board replacement 

When you replace the main board with new one, this repair item should be selected in 
the Sequential repair service program. 

NOTE: Before replace the defective main board, connect the printer to the PC 
and run this program to confirm the necessary logic circuit is active. 
If the CPU and I/F receiver IC, EEPROM, RAM is not broken, Status 
monitor will detect the Fatal error and displayed on the screen. In this 
case, EEPROM back up function may be available. 

1 . Connect the defective printer and check if the status monitor display the Fatal error. 
If the status monitor display the Fatal error, click the "Close" button to proceed the 
next step. (Most of the case, the fatal error is displayed). 



2. Click the "Main board replacement" in the Sequential repair service program. 
The following menu is displayed. 



i-i i*i 




Adjusted item 

He.id voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Stylus COLOR 480 




J 

J 


Quit Menu -| g«*i*iis 



Flotation co u me i 
value 




I A fatal error has occurred. 
Remove any foreign objects, packingmaterials, or 
jammed paper from inside the printer. 
After removing the source of the problem, in order 

Close I 



1 

d 



Black Ink 

T013 



□ Color Ink " 

™ 4 :UUL 



D4 mode functions — 
C E* 

r Pr 

C Exchange Ink Cartridge 

C Rese 

P Checkthe Protection counter 



Figure 5-32. Click the Main board replacement 

3. Click "EEPROM back up" to read out all EEPROM data from the defective main 
board. The program starts to check the EEPROM condition on the defective Main 
board by clicking the "OK" button in the following message display on the screen. 



Figure 5-31. Close the Status monitor 




Figure 5-33. Check the EEPROM condition 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



4. If the EEPROM is normal condition, following message is displayed. Click the "OK" 
button to start the EEPROM back up function. 



Ilnformatit 


in | 


-V 


The EEPROM is OK condition. 
Click the [OK] button to start 
the EEPROM Back Up function. 




"OK 











Figure 5-34. Start EEPROM back up function 

In case the following message is displayed, the EEPROM back up function is 
disable. Click the "OK" button to proceed the Step 9) to input the necessary data to 
the new main board manually. 



fxl 


o 


EEPROM data may be defective. 
Click the [OK] button to 
proceed the next step. 




(ZIokIZjI 







Figure 5-35. EEPROM is defective. 

5. When the EEPROM back up is completed, following message is displayed. 

Replace the defective main board with new one by following the message and click the 
"OK" button after the replace the Main board. 



fx] 


/"~^~"\ Turn off the printer. 

■■__*■ J After replace the main board with new one, 
r Click the OK button. 




, i 


i OK i| 







6. Turn on the printer and click the "Load on EEPROM "to copy the EEPROM back up 
data to the new main board. It takes about 30 seconds to complete the EEPROM data 
copy. 



i-i i*i 




Main Board Replacement 



EEPROM back up has completed 




Adjusted Item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 



Protection counter 
value 



Stylus COLOR 480 EEPROM parameter back up is completed. 



Quit Menu Get status 



Figure 5-37. Copy the EEPROM data to the new main board. 

7. When the EEPROM back up data is copied successfully, following message is 

displayed and the necessary service items for Main board replacement is completed. 
Click the "Menu" button to exit this program. 



ipr 




Main Board Repiacement 



EEPROM I) i|>leted 

Loading on EEPROM has completed 




Adjusted item 

Head voltage ID 



Bi-D Adjustment 
value 

Multi shot 1 



Variable shot 

Piotection countei 
value 



EEPROM parameter load is completed. 



Figure 5-36. Replace the defective main board with new one 



Figure 5-38. EEPROM back up data copy succeed 

8. Click the "Get status" and check the Waste drain ink pad counter in this function. If the 
waste drain ink pad counter is around the limit counter, replace the pad and reset the 
counter according to the customer request. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



In case the EEPROM is broken on the defective main board and the EEPROM back up/ 
copy function is not available, replace the Main board with new one by following the 
message and click the "OK" button. 



<5> 



Turn off the printer. 
■*■ ^ After replace the main board with new one, 
Click the OK button. 



OK 



Figure 5-39. Replace the defective main board with new one. 

10. Click the "OK" button to proceed the following adjustment menu after turn on the 
printer. 























Adjusted Item 

Head voltage ID 


Main Board Replacemen 










1 1 


IU Ilipi^ ■ 


1 


Bi-D Adjustment 
value 

Multi hot 1 

Multi shot 2 
Variable shot 

Piotection countei 
value 

I 






Bi directional adjustment __ 




+ 




1 1 




^ 




lus COLO 


R4S0 


EEPROM condition check is completed. 


J 
d 


1 Quit 


7| Menu 


Get status 





Figure 5-40. Required adjustment item for main board replacement 

1 1 . Carry out the "Head voltage ID input "and "Bi-d Adjustment" by following the 
displayed procedure. 



12. After complete the Head ID input and Bi-d adjustment items, click the "Ink pad 
replacement" button. Replace the Waste drain ink pad with new one by following the 
message displayed on the screen. Turn on the printer after replace the Waste drain ink 
pad with new one and click the "OK" button to write the market setting and the 
default setting into the EEPROM. 



Turn off the printer. 
After replace the waste drain 
Ink Pad with new one, Click 
the OK button. 




OK 



Figure 5-41. Replace the Waste drain in pad & Set the market setting 



13. Click the "I/C replacement" button to replace the both I/C with new one. 
Replace the both I/C with new one by following the message. 



i-i ii 



Main Board Replacement 

He.nl voltage ID input has completed 

ional adjustment has completed 

Ink Pad leplacement hits completed. 




Adjusted item 

Head voltage ID 

Q2SYQ2 



Bi-D Adjustment 
value 

Multi shot 1 

m 

Multi shot 2 



Variable shot 

m 

Piotection countei 
value 



: counter has been initialized. 3 [Initialized 



Figure 5-42. Replace the both I/C with new one. 



14. Click the "Menu" button to exit the program. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



CAUTION 



I 



In case the EEPROM back up / copy function is not available and 
main board is replaced with new one, the new main board dose 
not have the current Ink counter and waste drain ink pad 
counter. So, you have to replace the Waste drain ink pad and 
both I/C with new one. 




The current setting is printed at the center of the five Bi-d adjustment 
patterns. So, check the center pattern and select the most aligned 
patter number. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



5.2.5 CR unit replacement or removal 

1. After you replace or remove the CR unit in the service activity, Click the "CR unit 
replacement or removal" in the Sequential repair service program. 

Adjusted Item 

Head volta ge ID 




Figure 5-43. CR unit replacement or removal 

2. Click the" Bi-directional adjustment" to perform the Bi-directional printing alignment 
by following the procedure displayed on the screen. 

3. When the Adjustment is completed following message is displayed. 







Adjusted Item 

Head voltage ID 


Carriage unit repiacement or removal 


Bi-directional adjustment has completed 


Bi-D Adjustment 
value 

Multi shot 1 

Multi shot 2 

Variable shot 

Piotection countei 
value 

r l 


Stylus COLOR 480 
Quit Menu Get status 




All adjustment items are completed. _l 
Click the [Menu] button to return to Repair Menu. 

d 



Figure 5-44. All adjustment is completed 

4. Click the "Get status" button and check the waste drain ink pad counter in this 
function. If the waste drain ink pad counter is around the limit counter, replace the pad 
and reset the counter according to the customer request. 

5. Click the "Menu" button to exit this program. 



5.2.6 CR motor replacement or removal 

1 . After you replace or remove the CR motor in the service activity, Click the "CR motor 
replacement or removal" in the Sequential repair service program. 



















Adjusted Item 


CR Motor repiacement 




i i 






Bi-D Adjustment 
value 

Multi shot 1 

□ 

Multi shot 2 
Variable shot 

Piotection countei 
value 

I I 




^^^^^H 






Stylus COLOR 480 


J 


| Olljt j MenU Get status 



Figure 5-45. CR motor replacement or removal 

2. Click the" Bi-directional adjustment" to perform the Bi-directional printing alignment 
by following the procedure displayed on the screen. 



When the Adjustment is completed following message is displayed 



■ -I hi 




Adjusted item 

Head voltage ID 

I I 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 
Variable shot 



Piotection countei 
value 



Stylus COLOR 480 
Quit I Menu I Getstat 



All adjustment items are completed. Zl 

Click the [Menu] button to return to Repair Menu. 

dl 



Figure 5-46. All adjustment is completed 

4. Click the "Get status" button and check the waste drain ink pad counter in this 
function. If the waste drain ink pad counter is around the limit counter, replace the pad 
and reset the counter according to the customer request. 

5. Click the "Menu" button to exit this program. 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



5.2.7 Printer mechanism replacement 

Stylus COLOR 480 dose not have ASP printer mechanism. So, you may not have a 
chance to use this function in your service activity. However, in case you change the 
printer mechanism in your printer swap service, use this function. 
The adjustment item and the order are same as "Printhead replacement". So, as for the 
detail, refer to Section 5.2.3 on page 108. 

NOTE: Use the function for the following case. 

* Printer mechanism (except the waste drain ink pad and circuit board, 
printhead) is changed with other one 

1 . Click the "Printer mechanism replacement" in the Sequential repair service program. 
Following menu is displayed. 




Adjusted ttetn 



He.i<l voltage ID 



n 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 
Variable shot 



Piotection countei 

value 



Figure 5-47. Printer mechanism replacement 

Follow the adjustment item displayed on the above menu. 

For the detail, refer to Section 5.2.3 on page 108 due to the adjustment item and order 

are same as "Printhead replacement". 



5.2.8 Waste ink pad replacement 

When the Waste drain ink pad is replaced with new one due to the maintenance error, 
you have to replace the Waste drain ink pad with new one and reset the counter. 

1 . Connect the printer to your PC and run the Adjustment program. If the waste drain ink 
pad counter reaches to the limit counter, the status monitor of this program displays the 
"Maintenance error" automatically. 




I A mentenance request error has occured. 
Turn off your printer and after replacing the waste ink 
pad, turn on your printer. In order to clear data 
corresponding to addresses of protection counter, 



Olny I 



Black Ink 
T013 



Color Ink 
T014 



;ddd 



-D4 mode functions 
C Execute Head Cleanin 

C Pr 

C Exchange Ink Cartridge 
C Resetthe Printer 



OK 



Figure 5-48. Maintenance error 

2. Turn off the printer and replace the Waste drain ink pad with new one. Click the 
"Clear" button to clear the waste drain ink pad counter stored in the EEPROM on the 
Main board after turn on the printer. 

If the status monitor dose not detect the Waste drain ink pad counter correctly, click the 
"Waste ink pad replacement" in the sequential repair service program and use the 
following function. Clicking the "Protection counter clear" button clears the counter in 
the EEPROM. The suitable waste drain ink pad life is set in the EEPROM 
automatically according to the market setting of the initial setting menu. 













Waste 


ink Pad renter emant 


Adjusted Item 






He.nl voltage ID 


1 1 


Bi-D Adjustment 
value 

Multi shot 1 


1 


_ 


Multi shot 2 






Variable shot 






Piotection countei 
value 

I 


Stylus COLOR 480 


J 


Quit 1 1 Menu | Get status 




d 





Figure 5-49. Waste drain ink pad replacement 



Sequential Repair Service Program feature 



EPSON Stylus COLOR 480 



Revision B 



5.3 Individual service adjustment program feature 5.3.1 Get status function 



This program menu is almost same as the previous adjustment program. However, this 
program can run under the D4 protocol. So, followings new function is available. 

□ Get status function 

This function can check the printer status even if the printer is error condition 
except the main (CPU, I/F receiver IC, RAM) logic circuit failure, and control the 
printer by using the D4 mode functions. 

□ Protection counter reset/check function (waste drain ink pad counter) 

The previous adjustment program runs under the IEEE 1284 Nibble protocol. 
So, in case the protection counter reaches to the limit counter, the protection 
counter reset function is not available because the printer is error condition 
(maintenance error). However, this function of this program can reset the counter 
even if the maintenance error occurs. 

□ EEPROM check function 

You can check the EEPROM data or can write down the specific data into the 
EEPROM directly by using this function even if the printer is error condition. 
However, in case the one of the main logic circuit (CPU, I/F receiver IC, 
EEPROM, RAM) is broken, this function is not available. 

□ Refurbishment for DOA 

This function charge the cleaning liquid into the printhead cavity and eject the 
cleaning liquid to the waste drain ink pad. By this operation, the printhead and cap 
assembly is cleaned. Prepare the dummy ink cartridge and S46 cleaning liquid, 
injector before use this program. 

Depending on the situation, use the individual adjustment program. In this section, we 
will explain only the important item and notice about the usage of this program. 



This function is available in the Individual service adjustment program also. Use this 
function depend on the situation. However, if any error occurs on the printer while 
using the program, Status monitor is displayed automatically and indicates the error 
status for your confirmation. This function is completely same as the Get status 
function built in the Sequential repair service program. 

5.3.2 Head cleaning function 

This printhead cleaning is CLl'and about 1/8 of the brand-new black I/C and 1/18 of 
the brand-new color I/C are consumed. Before use this function, check the remaining 
ink amount of the both I/C by using the "Get status" function. 

5.3.3 Initial ink charge function 

This function consume about 1/2 of the brand-new black I/C and 1/7 of the brand-new 
color I/C. Before use this function, check the remaining ink amount of the both I/C by 
using the "Get status" function. So, do not use this function frequently. 

5.3.4 Protection counter check/reset 

This function resets or checks the current waste drain ink pad counter. 
Especially, use the counter check function before return the repair product to your 
customer. If the waste drain ink pad counter is near end condition, contact your 
customer and recommend your customer to replace the waste drain ink pad with new 
one. 



Individual service adjustment program feature 



EPSON Stylus COLOR 480 



Revision B 



5.3.5 EEPROM check function 

You can check the EEPROM data or can write the specific data into the specific 
address of the EEPROM directly even if the printer is error condition. (In case one of 
the main logic circuit such as CPU, I/F receiver IC, RAM, EEPROM is broken, this 
function is not available) 

Select the "EEPROM check" function in the Maintenance menu. The main menu of 
this function is as following figure. The following three function is built in this 
program. 

■ Check the cleaning counter 

You can check the following information stored in the EEPROM. 

* How many times of the manual cleaning were performed on the product. 

* What kind of the manual cleaning was performed on the product. 

■ Check the EEPROM data 

You can check the specific data stored in the specific address of the EEPROM. 
Input the specific address with hexadecimal code by referring Section 7.1.2 on 
page 131 (EEPROM map). Use this function in your analysis usefully. 

■ Change EEPROM data 

You can change the specific data stored in the specific address of the EEPROM. 
However, do not use this function except the special case. Careless usage causes 
any trouble. 

Adjusted Item 



Adjustment 
Maintenance | Print A4 pattern 



■Maintenance Item — 
r Head cleaning 

C Initial ink charge 

r Refurbishment for DOA 

r Protection counter check 

(? lEPROM check] 



Check the EEPROM data 



■Item — 

S Check the Cleaning counter 

r Check the EEPROM data 

r Change the EEPROM data 



OK 



He.nl voltage ID 

I 



Bi-D Adjustment 
value 

Multi shot 1 



Multi shot 2 

□ 

Variable shot 



Pi election countei 
value 






Stylus COLOR 480 
Quit Get status 



-j 



CAUTION 



I 



Do not use this function except the special case. Careless usage 
causes any trouble. 



Figure 5-50. EEPROM function 



Individual service adjustment program feature 



EPSON Stylus COLOR 480 



Revision B 



5.3.6 Refurbishment for DOA 

If you clean the cavity of the printhead and cap assembly, this function will be useful. 



CAUTION 



I 



After carry out this function, replace the waste drain ink pad 
with new one and reset the Waste drain ink pad counter. 
Otherwise, the ink or S46 liquid may leak from the pad during 
the transportation. 

■ Prepare the following tool. 

* Dummy ink cartridge, Injector, S46 liquid 

■ Do not carry out this program (Exchange sequence 1&2) 
repeatedly. This operation is available only one time. 
Excessive operation causes overflow of the ink& S46 liquid. 

■ When you refurbish the repair product by using this program, 
do it on your responsibility. 

■ When you charge S46 liquid into the dummy ink cartridge with 
the Injector, make sure fill out the dummy ink cartridge with S46 
liquid. In case enough S46 liquid is not charged into the dummy 
cartridge, the printhead will not cleaned and not filled with the 
S46 liquid enough in this operation. 

■ Keep the S46 liquid and the dummy ink cartridge clean. 

Select the "Refurbishment for DOA" function in the Maintenance menu. The main 
menu of this function is as following figure. 







Adjustment 
Maintenance | Print A4 pattern 


Transportation Liquid Exchange 




Adjusted Item 

Head voltage ID 




Select the exchange sequence in order as below 




I I 


r Head cleaning 
r Initial ink charge 


EXCHANGE SEOUENCE 1 | 




Bi-D Adjustment 
value 

Multi shot 1 

□ 

Multi shot 2 

□ 

lie shot 


EXCHANGE SEQUENCE 2 | 


(T jRefi iAj 




r Protection countercheck 


CAUTION Yqu mu ^ re p| ace ^ e waste j^ p ac | 

J after performing all function. 




C EEPROM check 






1 ' 






Piotection countei 
value 

I I 






Stylus COLOR 480 




J 


Ouit Get$tatu* 












d 





Exchange sequence 1 

Set the dummy I/C filled with S46 liquid into the CR unit and click the 
"EXCHANGE SEQUENCE1" in the Transportation Liquid Exchange menu. 
The S46 liquid is charged into the printhead cavity and ink is discharged from 
printhead cavity to the cap. 

Exchange Sequence 2 

Remove the dummy I/C from the CR unit and click the "EXCHANGE 
SEQUENCE2" in the Transportation Liquid Exchange menu. In this sequence, the 
S46 liquid is not discharged from the printhead and only the ink in the cap is 
discharged to the waste drain ink pad. After complete this sequence, this program 
set the initial ink charge flag into the EEPROM and reset the several ink 
consumption counters to "0". 



Figure 5-51. Refurbishment for DOA 



Individual service adjustment program feature 



EPSON Stylus COLOR 480 



Revision B 



5.3.7 A4 Check pattern 

We recommend to use this function to check the repaired product quality in your final 
stage of your repair. The following 6 items are printed on the check pattern. 

















Adjustment 
Maintenance Print A4 pattern 


Print A4 pattern 

1. Beta pattern(BK-C-M-Y) 




Adjusted Item 

Head voltage ID 

I I 


<■' =A4 pattern will print] 


2. Nozzle check pattern(BK-C-M-Y) 

3. Alignment pattern(BK-C-M-Y) 

4. Bi-d check pattern 




E>i-D Adjustment 
value 

Multi shot 1 




5. Head actuatoi v'oltage ID 




Multi shot 2 

ile shot 

Piotection counTei 
value 

I 1 




6. Ink waste pad counter value 




OK | 




Stylus COLOR 480 




J 


Ouit Get statu* 




d 







CAUTION 



I 




Figure 5-52. A4 Check pattern 

Do not print the A4 Check pattern on the EPSON exclusive paper 
such as Photo quality ink jet paper. This check pattern is for the plain 
paper. So, use the Plain paper for this check pattern printing. 



The check point for the first black and each color solid pattern 
(beta pattern 360 x 360dpi normal dot) in the A4 Check pattern 
is as follows. 

- Any white line is not observed 

- Uneven banding is not observed extremely 

The check point for the second Nozzle check pattern (120dpi) is 
as follows. 

- Ink is fired from all nozzles. 

- Uneven banding is not observed extremely. 

The check point for the third Alignment pattern is as follows. 

- Each vertical line is printed straight. 

If any incorrect printing is observed on the A4 Check pattern, 
perform the head cleaning or bi-d adjustment. If the 
phenomenon is not improved, replace the printhead or suitable 
mechanical parts. 



***************** gtylUtt COLOR 460 CHECK PATTERN PRINT ***************** 
1. Batat BK-C-H-T ) 




Figure 5-53. A4 Check pattern 



Individual service adjustment program feature 




MAINTENANCE 



EPSON Stylus COLOR 480 



Revision B 



6.1 Overview 



This section provides information to maintain the printer in its optimum condition. 

6.1.1 Cleaning 

This printer has no mechanical components which require regular cleaning except the 
printhead. Therefore, when returning the printer to the user, check the following parts 
and perform appropriate cleaning if stain is noticeable. 



CAUTION 



I 



Never use chemical solvents, such as thinner, benzine, and acetone 

to clean the exterior parts of printer like the housing. These 

chemicals may deform or deteriorate the components of the 

printer. 

Be careful not to damage any components when you clean inside 

the printer. 

Do not scratch the surface (coated part) of PF roller assembly. Use 

soft brush to wipe off any dusts. Use a soft cloth moistened with 

alcohol to remove the ink stain. 

Do not use cleaning sheet included in the media for normal usage. 

It may damage the coated surface of PF roller. 

If the adhesive surface of the cleaning sheet is set to the ASF LD 

roller side and used to clean the ASF LD roller surface, it is no 

problem. 



□ Exterior parts 

Use a clean soft cloth moistened with water and wipe off any dirt. If the exterior 
parts are stained with ink, use a cloth moistened with neutral detergent to wipe it 
off. 

□ Inside the printer 

Use a vacuum cleaner to remove any paper dust. 

□ ASF LD Roller 

If paper dust on the surface of ASF LD Roller lowers the friction, set the adhesive 
surface of the cleaning sheet included in the media to the surface of the ASF roller 
and repeat loading paper from the ASF. 



Maintenance 



Overview 



EPSON Stylus COLOR 480 



Revision B 



6.1.2 Service Maintenance 

If any abnormal print (dot missing, white line, etc.) has occurred or the Status monitor 
indicates Maintenance Request Error (This error is displayed as "unknown error" in the 
STM3), take the following actions to clear the error. 

□ Head Cleaning 

When dot missing or banding phenomenon has occurred, printhead cleaning 
operation is required by using the built-in head cleaning function. This function 
can be executed only from the Printer driver utility and Service Adjustment 
program because this printer dose not have any control panel. 
Stylus COLOR 480 has 3 modes for manual cleaning and even during printing, 
appropriate cleaning mode is automatically selected and executed according to 
various conditions. When you select and execute manual cleaning in the Printer, 
driver utility, the most appropriate cleaning mode is selected and therefore the 
cleaning completion period varies depending on the mode. (Refer to "Ink 
Sequence" on page 41.) 

The following is the process to perform the head cleaning from the Printer driver 
utility. As for the operation of the Adjustment program, refer to Chapter 5 
Adjustment. 



1. Make sure that the printer is in stand-by state by using the Status monitor 3. 
If the printer is in standby mode, following figure is indicated on the monitor. 

~3 



2. Select the Head Cleaning in the Printer driver utility and perform the Head cleaning. 
After performing the head cleaning sequence, perform the print check. If you repeat 
cleaning without print check, the weakest cleaning, CL1 will be repeated. 



j Main | (jj Paper | .*> Layout <$(5 Utility 
EPSON Status Monitor 3(W) 



Use this utility to automatically check for errors 
and also check the level of ink remaining. 



^ 



Nozzle CheckfJ) 



Use this utility if gaps or faint areas appear in 
your printout. 



N* 



Head Cleaning(D) 



Use this utility if your print quality declines or 
the Nozzle Check indicates clogged nozzles. 



VA 



Print Head Alignrr 



J> 



Use this utility if misaligned vertical lines 
appear in your printout. 



Ink Cartridge Replacement(R) 



Use this utility to replace an old or damaged 
ink cartridge before ink has run out. 



Speed & Progress 



] 4^>tZJl/ | ^Jl/3? 



Figure 6-2. Head cleaning function in the Printer driver utility 




Ready to print 



J 



f UK 



Ink Levels 

Black Ink 
T013 I 


y / 


. 






( d 




Color Ink 
T014 ! 


- 


U 





Figure 6-1. Status monitor 3 indication 



Maintenance 



Overview 



EPSON Stylus COLOR 480 



Revision B 



Maintenance Request Error (Unknown error) 

Ink is used for cleaning operation as well as printing. When ink is used for 
cleaning, the ink is drained to Waste Ink Pad (Ink Absorber Tray Assembly) and 
the amount of waste ink is recorded in the EEPROM on the MAIN board. 
Due to this, when the waste ink has reached the limit of the absorbing capability of 
the Waste Ink Pad, Unknown Error is indicated on Status monitor 3 as following 
figure. 



6.1.3 Lubrication 

The characteristics of the grease have great affects on the mechanical function and 
durability, especially does the characteristics about temperature environment. The type 
and amount of grease used to lubricate the printer parts are determined based on the 
results of internal evaluations. Therefore, be sure to apply the specified type and 
amount of grease to the specified part of the printer mechanism during servicing. 




An unknown error has occurred. 

Unplug your printer and contact your dealer or 

authorised service center. 



~3 
J 



OK 



inK l 


eve is 


{ ' 


Color Ink 
T014 " 






f 




Black Ink 
7U13 


1 






/ 











Figure 6-3. Maintenance Error indication in STM3 

In this case, replace the Waste Ink Pad and clear the Waste Ink Counter stored in 
EEPROM. Waste Ink Counter can be reset only from the Adjustment program because 
this printer dose not have control panel. As for the procedure, refer to Chapter 5 
Adjustment. 



CAUTION 



I 



Never use oil or grease other than those specified in this 
manual. Use of different types of oil or grease may damage the 
component or give bad influence on the printer function. 
Never apply larger amount of grease than specified in this 
manual. 



Table 6-1. Specified Lubricants 



Type I Name 1 EPSON Code 1 Supplier 


Grease 


G-26 


B702600001 


EPSON 


Grease 


G55 


1055459 


EPSON 



Maintenance 



Overview 



EPSON Stylus COLOR 480 



Revision B 



Table 6-2. Lubrication Point 



Table 6-2. Lubrication Point 



No. 


Lubrication Type/Point 


Remarks 




<Lubrication Point> 


• Do not attach the grease to other 




• Inside the CR shaft hole of the CR unit. 


portion of the CR unit. 




Refer to Figure 6-4, "Lubrication point 1". 


• Use a syringe to apply it. 


1 


<Lubrication Typo 
• G-55 
<Lubrication Amount> 


• Move the CR guide left and 
right, smooth out the Geese on 
the surface of the CR guide 
shaft. 




• Whole inside the CR shaft hole evenly. 


• After lubrication, make sure that 




40+/15mg x 2 


the carriage moves smoothly. 




<Lubrication Point> 


• Do not attach the grease to the 




• Contact point between PF roller and the PF 


paper path. 




grounding spring. Refer to Figure 6-5, 


• Use a syringe to apply it. 




"Lubrication point 2". 




2 


<Lubrication Typo 

• G-26 
<Lubrication Point> 

• $lmmx5mm 






<Lubrication Point> 


• Use a syringe to apply it. 




• Shaft of the Pully driven shaft. Refer to 






Figure 6-6, "Lubrication point 3". 




3 


<Lubrication Typo 

• G-26 

<Lubrication Amount> 

$lmmx 1mm 






<Lubrication Point> 


• Use a syringe to apply it. 




• Inside the sliding slot for ASF Hopper on 
the ASF Frame.Refer to Figure 6-7, 


• After lubrication, move the ASF 
hopper manually and smooth out 




"Lubrication point 4". 


the grease inside the ASF frame. 


4 


<Lubrication Type> 

• G-26 
<Lubrication Amount> 

• $lmm x 4points 





No. 1 Lubrication Type/Point 1 Remarks 


5 


<Lubrication Point> 

• Specified both edges area on the Front 
frame. Refer to Figure 6-8, "Lubrication 
point 5". 

<Lubrication Typo 

• G-26 
<Lubrication Amount> 

• $lmmx 40mm x 2 areas 


• Use a syringe to apply it. 

• After lubrication, move the CR 
unit left or right and smooth out 
the grease on the Front frame. 


6 


<Lubrication Point> 

• Between the Cam parts on the LD roller 
shaft and the ASF Hopper. Refer to Figure 
6-9, "Lubrication point 6". 

<Lubrication Typo 

• G-26 
<Lubrication Amount> 

• <Mmmx 1mm 


• The Cam parts on the LD roller 
shaft must touch the G-26 
lubricated on the ASF hopper in 
the LD roller shaft rotation. 


7 


<Lubrication Point> 

• Surface of the shaft on the Spur gear 15, E J 
at the Pump unit side. Refer to Figure 6-10, 
"Lubrication point 7". 

<Lubrication Typo 

• G-26 
<Lubrication Amount> 

• $lmmx 1mm 





Maintenance 



Overview 



EPSON Stylus COLOR 480 



Revision B 





Figure 6-4. Lubrication point 1 



Figure 6-6. Lubrication point 3 





Figure 6-5. Lubrication point 2 



Figure 6-7. Lubrication point 4 



Maintenance 



Overview 



EPSON Stylus COLOR 480 



Revision B 





Figure 6-8. Lubrication point 5 



Figure 6-10. Lubrication point 7 




Figure 6-9. Lubrication point 6 



Maintenance 



Overview 




APPENDIX 



EPSON Stylus COLOR 480 



Revision B 



7.1 Connector Summary 



7.1.1 Major Component Unit 

The Major component units of this printer are as follows. 

□ Main Board (C367MAIN or C367MAIN-B) 

□ Power Supply Board (C367PSB/PSE) 

The figure below shows how these components connect. 




AC Power 



C367MAIN/ 
MAIN-B 



CN4 CN3 CN2 CN1 



FT 

-inthead % 



Printhead 

PF Motor 

CR Motor 

Printer Mechanism 



Parallel I/F 



HP/PE/BCO/ 
CCO Sensor 



Figure 7-1. Connection of the Major Components 

See the following tables for the connector summary for the C367MAIN board and each 
connector's pin alignment. 



Table 7-1. Connector Summary for C367MAIN/MAIN-B 



Connector 


Function 


Table to refer to 


CN1 


For connection with the HP/PE/BCO/CCO sensor 


Table 7-2 


CN2 


For connection with the CR motor 


Table 7-3 


CN3 


For connection with the PF motor 


Table 7-4 


CN4 


For connection with the printhead 


Table 7-5 


CN5 


For connection with the power supply board 


Table 7-6 


CN6 


For connection with the parallel interface 


Refer to "IEEE- 1284 
Parallel I/F (Forward 
Channel)" on page 21 



Table 7-2. CN1 - HP/PE/BCO/CCO Sensor 



Pin 1 Signal Name 1 I/O 1 Function 


1 


HPPE 


In 


Sensor detect signal 


2 


GND 


— 


Ground 


3 


HPPEV 


— 


Sensor Power Supply 





Table 7-3. 


CN2 - CR Motor 


Pin 


Signal Name 1 I/O 


1 Function 


1 


CRA 


Out 


Phase drive signal (A) 


2 


CRB 


Out 


Phase drive signal (-A) 


3 


CRA 


Out 


Phase drive signal (B) 


4 


CRB 


Out 


Phase drive signal (-B) 



Appendix 



Connector Summary 



EPSON Stylus COLOR 480 



Revision B 



Table 7-4. CN3 - PF Motor 



Table 7-6. CN5 - Power Supply Board 



Pin 1 Signal Name 1 I/O 1 Function 


1 


PFA 


Out 


Phase drive signal (A) 


2 


PFB 


Out 


Phase drive signal (-A) 


3 


PFA 


Out 


Phase drive signal (B) 


4 


PFB 


Out 


Phase drive signal (-B) 


Table 7-5. CN4 - Printhead 


Pin 1 Signal Name 1 I/O 1 Function 


1 


THM 


In 


Thermistor detect signal 


2 


CH 


Out 


Waveform selection signal for MS shot & 
variable shot 


3 


GND 


— 


Ground 


4 


LAT 


Out 


Head data latch pulse output 


5 


GND 


— 


Ground 


6 


NCHG 


Out 


All nozzle fire selection pulse 


7 


GND 


— 


Ground 


8 


SCK 


Out 


Serial clock 


9 


GND 


— 


Ground 


10 


SI2 


Out 


Print data output (2) 


11 


SP 


Out 


Select signal for CH signal 


12 


SI1 


Out 


Print data output (1) 


13 


VDD 


— 


Logic power supply (+5V) 


14 


GND2 


— 


Ground 


15 


COM 


— 


Head drive pulse (trapezoid waveform) 


16 


VHV 


— 


+42V power supply for nozzle selector 



Pin 


Signal Name 


I/O 


Function 


1 


+42V 


— 


Mechanism drive power supply 


2 


+42V 


— 


Mechanism drive power supply 


3 


GND 


— 


Ground 


4 


GND 


In 


Energy saving signal 


5 


NC 


In 


Not connected 


6 


GND 


— 


Ground 


7 


GND 


— 


Ground 


8 


+5V 


— 


Logic power supply 



Appendix 



Connector Summary 



EPSON Stylus COLOR 480 



Revision B 



7.1.2 EEPROM Address Map 

Table 7-7. EEPROM Address Map 



Table 7-7. EEPROM Address Map (continued) 



t^ , .- o ... Q piT Factory 
Address Explanation Setting 

setting setting 


00H 


Password 




5AH 


5AH 


01H 


0FH 


OFH 


02H 


Market 


0: World 

1 : Japan 

2: Custom (MJ-)** 

3: Custom (Stylus COLOR)** 

4: Custom (other name)** 


00H 


00H 


03H 


1st dot adjustment 


-40 < n < 40 (by 1/1440 inch) 


00H 


(*1) 


04H 


Bi-D adjustment data 
(Multi shot 2) 


-36 < n < 36 (by 1/1440 inch) 


00H 


(*1) 


05H 


Bi-D adjustment data 
(Multi shot 1) 


-36 < n < 36 (by 1/1440 inch) 


00H 


(*1) 


06H 


Uni-D adjustment 
data 


-36 < n < 36 (by 1/1440 inch) 


00H 


(*1) 


07H 


Bi-D adjustment data 
(Variable shot) 


-36 < n < 36 (by 1/1440 inch) 


00H 


(*1) 


08H 


Carriage speed 
adjustment data 


-4 < n < 4 (by G.A. timer unit) 


00H 


00H 


09H 


Head actuator rank 
ID for VhL 




00H 


(*1) 


OAH 


Head actuator rank 
ID for VhN 




00H 


(*1) 


OBH 


Head actuator rank 
ID for VhM 




00H 


(*1) 


OCH 


Head actuator rank 
ID for VhV 




00H 


(*1) 


ODH 


Head actuator rank 
ID for AR 




00H 


(*1) 



t^ i .- o ... Q piT Factory 
Address Explanation Setting AA . ... 

setting setting 


OEH 


Head rank MW-ID 




00H 


00H 


OFH 


Reserved 




00H 


00H 


10H 


Password 1 




5AH 


5AH 


11H 


OFH 


OFH 


12H 


Head actuator rank 
ID for IWAB 




00H 


00H 


13H 


Head actuator rank 
ID for IWCD 




00H 


00H 


14H 


Head actuator rank 
ID for IWEF 




00H 


00H 


15H 


Reserved 




00H 


00H 


16H-19H 


Custom EEPROM 
sub number 




00H 


00H 


1AH- 
1DH 


Reserved 




00H 


00H 


1EH 


Reserved 




00H 


00H 


1FH-21H 


Reserved 




00H 


00H 


22H 


Interface selection 


0:Auto 1: Parallel 

2: Serial 3: USB (Reserved) 


00H 


00H 


23H 


Interface wait time 


to 255 (by second) 


OAH 


OAH 


24H 


Parallel I/F speed 
(Reserved) 


0: High speed 1: Normal 


00H 


00H 


25H 


IEEE1284.4 for 
Parallel 


0: Auto 1: On 
2: Off 


01H 


01H 


26H 


Reserved for 
IEEE1284.4forUSB 


0: Auto 1: On 
2: Off 


00H 


00H 


27H 


Print direction 
control 


0: Bi-D 1: Uni-D 
2: Auto 


02H 


02H 



Appendix 



Connector Summary 



EPSON Stylus COLOR 480 



Revision B 



Table 7-7. EEPROM Address Map (continued) 



Table 7-7. EEPROM Address Map (continued) 



t^ , .• o ... Q piT Factory 
Address Explanation Setting AA . ... 

setting setting 


28H 


Reserved 




00H 


00H 


29H 


Bi-d Alignment 
request 


bit2 :Bi-d Alignment request 
(0=request, l=no request) 


00H 


00H 


2AH 


Reserved for CG 
table 




00H 


00H 


2BH-2FH 


Reserved for USB 




00H 


00H 


30H-39H 


00H 


00H 


3AH-3DH 


00H 


00H 


3EH 


CR-phase of Home 




00H 


00H 


3FH 


reserved 




00H 


00H 


40H 


Password 3 




5AH 


5AH 


41H 


OFH 


OFH 


42H 


Ink flags 


bit7: reserved 

bit6: black "one time" 

bit5: color "one time" 

bit4: Initial fill required 

bit3: reserved 

bit2: in cleaning seq. 

bitl: black CL required 

bitO: color CL required 


10H 


10H 



t^ i .- o ... Q piT Factory 
Address Explanation Setting AA . ... 

setting setting 


43H 


Ink flags 2 


bit5: Printed after Cleaning 

0: Not printed after Cleaning 

1 : Printed after Cleaning 
bit4: YMC first cartridge 

0: Not first cartridge 

1 : first cartridge 
bit3: Black first cartridge 

0: Not first cartridge 

1 : first cartridge 
bit2: YMC cartridge changed 
and cleaned 

0: first cartridge 

1: changed 
bitl: Black cartridge changed 
and cleaned 

0: first cartridge 

1: changed 
bitO: Black cartridge changed 
and cleaned 

0: with YMC cartridge 

1: alone 


00H 


00H 


44H-47H 


Ink counter Cb (total) 
1 count = 100 (ng) 




00H 


00H 


48H-4BH 


Ink counter Cy (total) 
1 count = 100 (ng) 




00H 


00H 


4CH-4FH 


Ink counter Cm 

(total) 

1 count = 100 (ng) 




00H 


00H 


50H 


Password 4 




5AH 


5AH 


51H 


OFH 


OFH 


52H-55H 


Ink counter Cc (total) 
1 count = 100 (ng) 




00H 


00H 



Appendix 



Connector Summary 



EPSON Stylus COLOR 480 



Revision B 



Table 7-7. EEPROM Address Map (continued) 



Table 7-7. EEPROM Address Map (continued) 



t^ , .• o ... Q piT Factory 
Address Explanation Setting AA . ... 

setting setting 


56H 


Cleaning counter for 
CL1 counter 




00H 


00H 


57H 


Cleaning counter for 
CL1' counter 




00H 


00H 


58H 


Cleaning counter for 
CL2 counter 




00H 


00H 


59H 


Cleaning counter for 
out of HP CL counter 




00H 


00H 


5AH 


Cleaning counter for 
timer cleaning 
counter 




00H 


00H 


5BH 


Cleaning counter for 
Bk replace CL 
counter 




00H 


00H 


5CH 


Cleaning counter for 
YMC replace CL 
counter 




00H 


00H 


5DH 


Reserved 




00H 


00H 


5EH 


Reserved 




00H 


00H 


5FH 


Reserved 




00H 


00H 


60H 


Password 5 




5AH 


5AH 


61H 


OFH 


OFH 


62H 


Ink counter RbO 




00H 


00H 


63H 


00H 


00H 


64H 


Ink counter RyO 




00H 


00H 


65H 


00H 


00H 


66H 


Ink counter A 




00H 


00H 


67H 


00H 


00H 



t^ i .- o ... Q piT Factory 
Address Explanation Setting AA . ... 

setting setting 


68H 


Reserved 




00H 


00H 


69H 


Reserved 




00H 


00H 


6AH 


CL time 


Time data command which is sent 
from printer driver is stored only 
when the Timer CL is performed. 


00H 


00H 


6BH 


00H 


00H 


6CH 


accumulated printing 
time 


0: minute 1: 15 minutes 
2: 30 minutes 3: 60 minutes 
4: 90 minutes 5: 120 minutes 


00H 


00H 


6DH 


00H 


00H 


6EH 


CL Time without 
timer command 


Time data which is generated in the 
CPU clock is stored. 


00H 


00H 


6FH 


00H 


00H 


70H 


Reserved for 
Password 7 




00H 


00H 


71H 


00H 


00H 


72H-79H 
7AH-7FH 


customized model 
name 


string of model field for Device ID 


00H 


00H 



Appendix 



Connector Summary 



EPSON Stylus COLOR 480 



Revision B 



7.2 Component Layout 



naBH 



ASSY ♦ 2034518 00 





CD 

IC6 RS : 

C2CZZ 



B ffi^ S8 D W -ft BOW 8 ' 




i "CNi" 3 



Figure 7-2. C367MAIN Component Layout (Parts Side) 



Figure 7-3. C367 MAIN B Component Layout 



Appendix 



Component Layout 



EPSON Stylus COLOR 480 



Revision B 



oo oozveoz'Assv 

®SUA CMK-P2X 

L 



N 
(White) 




_C2 

MODEL EPS -53 



00 ZOZTCOZ'ASSV 
<§>!&▲ CMK-P2X 
(Brown ) 




C2 

model EPS-53E 



06^082 Q83 



Figure 7-4. C367PSB Component Layout 



Figure 7-5. C367PSE Component Layout 



Appendix 



Component Layout 



EPSON Stylus COLOR 480 



Revision B 



7.3 Exploded Diagram 



Following pages shows exploded diagram. 




Figure 7-6. Stylus Color 480 Exploded Diagram 1 



Appendix 



Exploded Diagram 



EPSON Stylus COLOR 480 



Revision B 




735 



TOO 



Figure 7-7. Stylus Color 480 Exploded Diagram 2 



Appendix 



Exploded Diagram 



EPSON Stylus COLOR 480 



Revision B 



122 




Figure 7-8. Stylus Color 480 Exploded Diagram 3 



Appendix 



Exploded Diagram 



EPSON Stylus COLOR 480 



Revision B 



726 




5DQ 



125 



132 




^^, 



® 



122 




122 



W^j 






Figure 7-9. Stylus Color 480 Exploded Diagram 4 



Appendix 



Exploded Diagram 



EPSON Stylus COLOR 480 



Revision B 




EPSON STYLUS COLOR 480 



No. 5 Rev-01 1«G2«04 



Figure 7-10. Stylus Color 480 Packing material 



Appendix 



Exploded Diagram 



EPSON Stylus COLOR 480 



Revision B 



7.4 Parts List 



Table 7-8. Stylus COLOR 480 Parts List 



Table 7-8. Stylus COLOR 480 Parts List 



Code Parts Name 


100 


HOUSING 


101 


COVER,PRINTER 


102 


PAPERSUPPORT 


103 


HOUSING,SUPPORT,LEFT 


104 


SHIELDPLATE,UPPER 


105 


COVER,SHIELD PLATE,LEFT 


106 


SHIELD PLATE,M/B;B 


107 


LOGO PLATE 


108 


HOUSING, FRONT 


109 


FOOT 


110 


GROUNDING, PLATE 


122 


C.B.S. SCREW 


123 


C.B.(O) SCREW,4X5,F/ZG 


124 


C,B,S-TITE R.SCREW,3X6,F/UC 


125 


C.B.P-TITE SCREW,3X8,F/ZN 


200 


BOARD ASSY., MAIN 


C37 


ALUMINIUM ELECTROLYTIC CAPACITOR 


C39 


ALUMINIUM ELECTROLYTIC CAPACITOR 


C40 


ALUMINIUM ELECTROLYTIC CAPACITOR 


C41 


ALUMINIUM ELECTROLYTIC CAPACITOR 


C45 


ALUMINIUM ELECTROLYTIC CAPACITOR 


C48 


ALUMINIUM ELECTROLYTIC CAPACITOR 



Code Parts Name 


C64 


ALUMINIUM ELECTROLYTIC CAPACITOR 


CN1 


CONNECTOR 


CN2 


CONNECTOR 


CN3 


CONNECTOR 


CN4 


CONNECTOR 


CN6 


CONNECTOR 57RE-40360-830B(D7B) 


CR2 


CERAMIC CRYSTAL 


D1 


DIODE 


D2 


DIODE 


D3 


DIODE 


D4 


DIODE 


D5 


DIODE 


D6 


DIODE 


D7 


DIODE 


D8 


DIODE 


F1 


FUSE 


HT1 


HEAT SINK 


IC10 


TTL-IC 


IC3 


EP-ROM 


IC3 


IC SOCKET 


IC4 


DRAM 


IC5 


EEPROM,AT93C46-1 0SC 


IC6 


RESET IC 


IC7 


IC 


IC8 


HIC 



Appendix 



Parts List 



EPSON Stylus COLOR 480 



Revision B 



Table 7-8. Stylus COLOR 480 Parts List 



Table 7-8. Stylus COLOR 480 Parts List 



Code 


Parts Name 


IC9 


HIC 


Q1 


C.B.SCREW,2.6X6,F/ZN 


Q1 


TRANSISTOR 


Q2 


C.B.SCREW,2.6X6,F/ZN 


Q2 


TRANSISTOR 


300 


BOARD ASSY., POWER SUPPLY 


501 


FRAME,MAIN 


502 


REINFORCEMENT PLATE,HOLDER 


503 


HOLDER,MOTOR ASSY.,CR 


504 


COMPRESSIONSPRING,15.7 


505 


PUMP ASSY. 


506 


CAP ASSY. 


507 


MOTOR ASSY.,CR 


508 


MOTOR ASSY., PF 


509 


TIMINGBELT 


510 


SPURGEAR,15 


511 


SPRINGPIN,2X14.5 


512 


FRAME,FRONT 


513 


PULLEY,DRIVEN 


514 


SHAFT,PULLEY,DRIVEN 


515 


SPURGEAR,34.2 


516 


COMBINATION GEAR,12.6,18.4 


517 


COMPRESSION SPRING,5.85 


518 


SPURGEAR,15.2 


519 


COMBINATION GEAR,8.4,21.6 



Code 


Parts Name 


520 


COMBINATION GEAR,9.6,33.6 


521 


SPACER,C-RING 


522 


ROLLER,PF 


523 


BUSHING, ROLLER,PF 


524 


BUSHING, ROLLER,PF,LEFT 


525 


SPACER,FASTEN,ROLLER,PF 


526 


GROUNDING WIRE,ROLLER,PF 


527 


C-RING 


528 


PLANE WASHER,1 2.2X0.5X1 5 


529 


RODSPRING,SHAFT,CR,GUIDE 


530 


CARRIAGE 


531 


SHAFT,CR,GUIDE 


532 


SLIDER,CR 


533 


GROUNDINGPLATE,HEAD 


534 


SPURGEAR,15,EJ 


535 


ROLLER,EJECT 


536 


PAPERGUIDE,ERONT 


537 


COVER,CARTRIDGE,BK 


538 


COVER,CARTRIDGE,C 


539 


TORSION SPRING,52.92 


540 


PAPERGUIDE,UPPER 


541 


ROLLER,DRIVEN 


542 


SHAFT,ROLLER,DRIVEN 


543 


HOLDER,STARWHEEL,FRONT 


544 


HOLDER,STARWHEEL,REAR 



Appendix 



Parts List 



EPSON Stylus COLOR 480 



Revision B 



Table 7-8. Stylus COLOR 480 Parts List 



Table 7-8. Stylus COLOR 480 Parts List 



Code 


Parts Name 


545 


STARWHEELASSY.,8;E 


546 


ROD SPRING,STAR WHEEL 


547 


C.C.S.SCREW 


548 


PAPERGUIDE,LEFT 


549 


SPACER,COVER CARTRIDGE 


700 


PRINT HEAD 


701 


LEVER,CHANGE 


702 


COMPRESSION SPRING,0.98 


703 


HARNESS,DETECTOR 


704 


DETECTOR,HP;C 


705 


HOLDER,SHAFT 


706 


LEVER,DETECTOR,HP 


707 


EDGEGUIDE 


708 


HOPPER 


709 


FRAME,ASF 


710 


PAD,HOPPER 


711 


HOLDER,PAD 


712 


PAD,LD,SMALL 


713 


PAD,BRAKE,EDGEGUIED 


714 


PAD,LD,C 


715 


LEVER,DETECTOR,PE 


716 


ROLLER,LD 


717 


EXTENSION SPRING,0.143 


718 


SHAFT,ROLLER,LD 


719 


CLUTCH 



Code Parts Name 


720 


SPURGEAR,35.2 


721 


COMBINATION GEAR,1 1 .2,32.4 


722 


COMBINATION GEAR,22.4,32 


723 


CABLE,HEAD;B 


724 


COMPRESSION SPRING,4.80 


725 


TORSIONSPRING,25.7 


726 


TORSIONSPRING,0.22 


727 


COMPRESSION SPRING 3.75 


728 


SHAFT,ROLLER,LD,SUPPORT 


729 


C.P.S-TITE(P4),3X6,F/ZN 


730 


TRAY,POROUSPAD 


731 


POROUSPAD,INKEJECT,LARGE 


732 


POROUSPAD,INKEJECT,SMALL 


733 


SHEET,PROTECTION;D 


734 


CLEANER, HEAD ASP 


735 


FERRITE CORE 


736 


HEXAGON NUT 


1 


INDIVIDUAL CARTON BOX FOR AMERICA 


3 


PAD PRINTER 


4 


PLASTIC PROTECTIVE BAG,360X680X0.03T 


NON FIG 


INK CARTRIDGE,B,OVERSEAS,AS 


NON FIG 


INK CARTRIDGE,C,OVERSEAS,AS 


NON FIG 


SOFTWARE CD-ROM, EAI 


NON FIG 


USER'S GUIDE 


NON FIG 


SETTING UP MANUAL 



Appendix 



Parts List 



EPSON Stylus COLOR 480 



Revision B 



Appendix 



Parts List 



EPSON Stylus COLOR 480 



Revision B 



7.5 Electrical Circuits 



See the following pages for the electric circuit diagrams below: 

□ C367MAIN control circuit board 

□ C367PSB power supply circuit board 

□ C367PSE power supply circuit board 



Appendix 



Electrical Circuits 



TP2®- 
TP 3 @- 



PR DM I iTT ^ 

Pi riM TTTN 



"TTi 



A 






iaTlT. 

ftTTT' 





A,,-,-,* 



us 



A,<*-> 



-A/ 



777/77 777 



& 



ro 



MI 



r v:: 



rr 



777 777 777 777 777 777 777 



U=8ft 



C367 MAIN Board Circuit 



A 






A 






!l 



A 



K: 



A 



A 



ill T [ft 
A 



A 









' ^ ^ p 




A,,,- 1 



A„-,t< 






<§ 



d 



-ii 



Ar 



g^Azk 



777 777 



J1ST 



rr 



AA A 



U=8ft 



C357 MAIN B Circuit Board 



DB1 



- C8 

"4700p 



rl LJ T l .j .i 



FG 
__C_2__ 



M 



0. BA 18mH 



CI 



Fl 
2- 5A 
125V 



300K 1/2W 
R28 



TH1 
8^ 



100-120VAC 



Cll 

150u 

200V 



C15 
3300p " 
1. 6kV 



Ql 

K3233 



LF-P3A-M3H2TA 



R20 R21 
3K 10K 



lOOOp 
50V 



D2 A 
ERA83-004 



R12 
1. 3 



Rig 

20K 



HT1 
[Ql) 



4700p 

50V 1.5K 

C13 Rll 
1 | WV — 



C5482 

Q2 _ Q3 

R15 A1015 



AK06 
Dl 




Wi 



IC1 i- 

NJM431L 



H33 
100K 



Tl 
PT-123 



C12 
Z?Z 100u 
25V 
105°C 



P 



RKig 

D51 



AC250V 
T630mA 
F51 



C51 
lOOOu 
50V 



^ 



TLP621-2(D4-GB) 



R69 
2K 



H68 
10K 



R91 
10K 



Q91 
I C1815 



R92 

49- 

IX 



-hO 



'w°- 



IC51 
L4962E/A 



390p 



"Ife 



R63 
4. 3K 

C58 
2200p 



L51 

470uH 

10/ 

-^rn — 



D55 + 7 



4^82 

2. 2u 50V 



,C54 
"470u 
5- 3V 



R93 

10K 

1% 



■ ZD90 
HZS3B-3 




ZD53 
HZS7A-1 



< R86 : 
!___1P_0_! 



C367 PSB Circuit board 



+42V/0. 25A 

+ 42V 

6ND 

GND 

PSC 

GND 

GND 

5V/Q. 35A 



HT51 

(IC511 



DB1 
S1VBA60 



/BAb(A/\. 



CB 
4700p 



FG 



C3 C4 



T^PE^I 



tI^PE^ 



FG 
C2 



^5 



R18 

vw 

620K 1/2W 

R2B 

^V\A^ 



620K 1/2W 



+ m 



0. 3A 55mH 



CI 



0. lu 



Fl 

Tl. 25AH 
250V 



I 



TH1 
16£2 



OHN51 



L N 

220-240VAC 



Cll 
33u 
400V 



C15 
lOOOp 
2. OkV 




LF-P3A-M3R2TA 



C14 

lOOOp 
50V 



D2 A 

ERA83-004 




Tl 
PT-124 



R19 
20K 



4700p 
50V 

C13 
1 I 



AK06 
Dl 



1. Ih 

Rll 

-AAA^- 




IC1 t- 
NJM431L 



+_ 



C12 



W lOOu 
25V 
105°C 



R33 
100K 



6. 



RK19 
D51 



AC250V 
T630mA 
F51 



UL 



C51 
lOOOu 
50V 



10 



:R69 
2K 



PCI 



;R68 
10K 



R91 

10K 



ZD51 . 
HZS7A-1 



Q91 

C1B15 



R92 

49. 

1% 



IC51 
L4962E/A 



LUQCJC/3 1— 
ZCDCDZ(X)\Z> 

hLLlOOMO 

oj m ^r id id r- 



9K 



C85 
390p 



R63 
4. 3K 

C58" 



L51 
470uH 
10% 
-^HP 



11EQS0B 

t D55 +4z C54 
470u 
6. 3V 



Z(ZCB2 

2. 2u 50V 



033u 



R93 

10K 

IX 



Q82 
C1815 



ZD52 . 
HZS24-2 

ZDB7 ' 
HZS24-2 



RB3 
10K : 



1 



C83 

0. 033u 



RB2 
IK 



ZD53 
HZS7A-1 



^A/V 



ZD90 
HZS36-3 






QB3 
DTA113Z 



R86 
___i_00_ 



-O 

-o 
-o 
-o 
o 
-o 
-o 



+42V/0. 25A 

+ 42V 

GND 

GND 

PSC 

GND 

GND 

5V/0. 35A 



^^^ 



-FG 



TLP621-21D4-GB) 



HT51 
(IC51 : 



C367 PSE Circuit Board